Jump to content

155 (number): Difference between revisions

From Wikipedia, the free encyclopedia
Browse history interactively
← Previous edit
Content deleted Content added
VisualWikitext
→In other fields: EMS in the Czech Republic and Slovakia
 
(26 intermediate revisions by 22 users not shown)
Line 1: Line 1:
{{example farm|date=February 2013}}
{{Infobox number
{{Infobox number
| number = 155
| number = 155
| divisor = 1, 5, 31, 155
| divisor = 1, 5, 31, 155
}}
}}
'''155''' ('''one hundred [and] fifty-five''') is the [[natural number]] following [[154 (number)|154]] and preceding [[156 (number)|156]]. It is a [[composite number]] and a [[semiprime]].
'''155''' ('''one hundred [and] fifty-five''') is the [[natural number]] following [[154 (number)|154]] and preceding [[156 (number)|156]].


== In mathematics ==
⚫
If you add up all the primes from the least through the greatest prime factors of 155, that is, 5 and 31, the result is 155. {{OEIS|id=A055233}} Only three other small semiprimes (10, 39, and 371) share this attribute.
'''155''' is:
*a [[composite number]]
*a [[semiprime]].
*a [[deficient number]], since [[1 (number)|1]]+[[5]]+[[31 (number)|31]]=[[37 (number)|37]]<155.
*[[Odious number|odious]], since its [[binary expansion]] <math>10011011_2</math> has a total of 5 ones in it.


There are 155 primitive permutations of degree 81. {{OEIS2C|id=A000019}}
There are 155 primitive [[permutation group]]s of degree 81. {{OEIS2C|id=A000019}}

⚫
If one adds up all the primes from the least through the greatest prime factors of 155, that is, 5 and 31, the result is 155. {{OEIS|id=A055233}} Only three other "small" semiprimes (10, 39, and 371) share this attribute.


==In the military==
==In the military==
* [[USS Capable (AM-155)]] was a [[United States Navy]] Admirable minesweeper ship during [[World War II]]
* {{USS|Capable|AM-155}} was a [[United States Navy]] ''Admirable''-class minesweeper during [[World War II]]
* [[USS Cole (DD-155)]] was a [[United States Navy]] Wickes-class [[destroyer]] during [[World War II]]
* {{USS|Cole|DD-155}} was a United States Navy ''Wickes''-class destroyer during World War II
* [[USS General A. W. Brewster (AP-155)]] was a [[United States Navy]] General G. O. Squier transport ship during [[World War II]]
* {{USS|General A. W. Brewster|AP-155}} was a United States Navy ''General G. O. Squier''-class transport during World War II
* [[USS Hopping (DE-155)]] was a [[United States Navy]] Buckley destroyer escort ship during [[World War II]]
* {{USS|Hopping|DE-155}} was a United States Navy ''Buckley''-class destroyer escort during World War II
* [[USS Lycoming (APA-155)]] was a [[United States Navy]] [[Haskell class attack transport|Haskell-class]] [[attack transport]] during [[World War II]]
* {{USS|Lycoming|APA-155}} was a United States Navy {{sclass|Haskell|attack transport}} during World War II
* [[USS Mustang (IX-155)]] was a [[United States Navy]] four-master wooden [[schooner]] during [[World War II]]
* {{USS|Mustang|IX-155}} was a United States Navy four-master wooden [[schooner]] during World War II
* [[155 mm|155mm artillery]], a common caliber


==In sports==
==In sports==


* The [[maximum break#Breaks_exceeding_147|maximum possible score]] in a single break in [[snooker]], with a free ball at the start of the break ([[147 (number)|147]] is the highest possible without a free ball)
* The [[maximum break#Breaks exceeding 147|maximum possible score]] in a single break in [[snooker]], with a free ball at the start of the break ([[147 (number)|147]] is the highest possible without a free ball)


==In transportation==
==In transportation==
* [[Alfa Romeo 155]], a [[compact executive car]] produced from 1992–1998
* [[Alfa Romeo 155]], a [[compact executive car]] produced from 1992 to 1998
* [https://web.archive.org/web/20021002191528/http://transit.metrokc.gov/tops/bus/schedules/s155_0_.html Seattle Bus Route 155]
* [https://web.archive.org/web/20021002191528/http://transit.metrokc.gov/tops/bus/schedules/s155_0_.html Seattle Bus Route 155]
* [http://www.londonbusroutes.net/times/155.htm London Bus Route 155]
* [http://www.londonbusroutes.net/times/155.htm London Bus Route 155]
* The [[British Rail Class 155]] is a [[diesel multiple unit]] [[United Kingdom|British]] [[train]]
* The [[British Rail Class 155]] is a [[diesel multiple unit]] [[United Kingdom|British]] [[train]]
* [[Blériot 155]] was a [[France|French]] [[airliner]] of the 1920s
* [[Blériot 155]] was a French [[airliner]] of the 1920s
* [[155th Street (Manhattan)|155th Street, Manhattan, New York]]
* [[155th Street (Manhattan)|155th Street, Manhattan, New York]]
* 155th Street New York City Subway stations:
* 155th Street New York City Subway stations:
Line 38: Line 45:
* The year [[155|AD 155]] or [[155 BC]]
* The year [[155|AD 155]] or [[155 BC]]
* 155 is the number for the International Operator in the United Kingdom
* 155 is the number for the International Operator in the United Kingdom
* 155 AH is a year in the [[Islamic calendar]] that corresponds to 771 &ndash; 772 [[Common Era|CE]]
* 155 is the number for the [[emergency medical services]] in the [[Czech Republic]] and [[Slovakia]]
* 155 AH is a year in the [[Islamic calendar]] that corresponds to 771&ndash;772 [[Common Era|CE]]
* [[155 Scylla]] is a [[Asteroid belt|main belt]] [[asteroid]]
* [[155 Scylla]] is a [[Asteroid belt|main belt]] [[asteroid]]
* [[Europium-155]] is a [[radioisotope]] or [[Europium]] and [[fission product]] with a [[half-life]] of 4.76 years
* [[Europium-155]] is a [[radioisotope]] or [[Europium]] and [[fission product]] with a [[half-life]] of 4.76 years
Line 44: Line 52:
* The dialing code for [[Obihiro, Japan]]
* The dialing code for [[Obihiro, Japan]]
* The [[atomic number]] of an element temporarily called [http://www.flw.com/datatools/periodic/001.php?id=155 unquintquinttium]
* The [[atomic number]] of an element temporarily called [http://www.flw.com/datatools/periodic/001.php?id=155 unquintquinttium]
* [[155 North Wacker]] is a 46-story [[skyscraper]] under [[construction]] in [[Chicago]]
* [[155 North Wacker]] is a 46-story [[skyscraper]] in [[Chicago]]
* [[Wolseley No. 155, Saskatchewan]] is a rural municipality in [[Canada]]
* [[Wolseley No. 155, Saskatchewan]], is a rural municipality in [[Canada]]


==See also==
==See also==
Line 58: Line 66:


==External links==
==External links==
{{Commons category|155 (number)}}
{{Commons category}}


{{Integers}}
{{Integers|1}}


{{DEFAULTSORT:155 (Number)}}
{{DEFAULTSORT:155 (Number)}}
{{Integers|1}}
[[Category:Integers]]
[[Category:Integers]]
{{Num-stub}}

Latest revision as of 11:30, 13 April 2024

← 154 155 156 →
Cardinalone hundred fifty-five
Ordinal155th
(one hundred fifty-fifth)
Factorization5 × 31
Divisors1, 5, 31, 155
Greek numeralΡΝΕ´
Roman numeralCLV
Binary100110112
Ternary122023
Senary4156
Octal2338
Duodecimal10B12
Hexadecimal9B16

155 (one hundred [and] fifty-five) is the natural number following 154 and preceding 156.

In mathematics

[edit]

155 is:

There are 155 primitive permutation groups of degree 81. OEIS: A000019

If one adds up all the primes from the least through the greatest prime factors of 155, that is, 5 and 31, the result is 155. (sequence A055233 in the OEIS) Only three other "small" semiprimes (10, 39, and 371) share this attribute.

In the military

[edit]

In sports

[edit]

In transportation

[edit]

In other fields

[edit]

155 is also:

See also

[edit]

References

[edit]
[edit]
Wikimedia Commons has media related to 155 (number).
Retrieved from "https://en.wikipedia.org/enwiki/w/index.php?title=155_(number)&oldid=1218717598"