131 (number)

← 130 131 132 →
100 200 300 400 500 600 700 800 900 →
Cardinal	one hundred thirty-one
Ordinal	131st (one hundred thirty-first)
Factorization	prime
Prime	32nd
Divisors	1, 131
Greek numeral	ΡΛΑ´
Roman numeral	CXXXI
Binary	100000112
Ternary	112123
Senary	3356
Octal	2038
Duodecimal	AB12
Hexadecimal	8316

131 (one hundred [and] thirty-one) is the natural number following 130 and preceding 132.

In mathematics

131 is a

with no imaginary part and real part of the form ${\displaystyle 3n-1}$. Because the next odd number, 133, is a semiprime, 131 is a Chen prime. 131 is an Ulam number.^[3]

131 is a

). The decimal expansion of 1/131 repeats the digits 007633587786259541984732824427480916030534351145038167938931 297709923664122137404580152671755725190839694656488549618320 6106870229 indefinitely.

In the military

• C-131 Samaritan was an American military transport produced from 1954 to 1956
• F/A-18C Hornet fighter squadron stationed at Naval Air Station Oceana
• Tiger 131 is a German Tiger I heavy tank captured in Tunisia by the British 48th Royal Tank Regiment during World War II
• fleet oiler
  during World War II
• USS Bandera (APA-131) was a is a United States Navy Haskell-class attack transport ship during World War II
• USS Buchanan (DD-131) was a United States Navy Wickes-class destroyer
• USS General T. H. Bliss (AP-131) was a United States Navy General G. O. Squier-class transport ship during World War II
• USS Hammann (DE-131) was a United States Navy Edsall-class destroyer escort during World War II
• USS Melucta (AK-131) was a United States Navy Crater-class cargo ship during World War II
• USS Walter X. Young (APD-131) was a ship of the United States Navy during World War II
• ZIL-131 is a 3.5-ton 6x6 army truck

In transportation

• London Buses route 131 is a Transport for London
  contracted bus route in London
• The Fiat 131 Mirafiori small/medium family car produced from 1974 to 1984
• STS-131 is a NASA Contingency Logistic Flight (CLF) of the Space Shuttle Atlantis which launched in April 2010

In other fields

131 is also:

• The year AD 131 or 131 BC
• 131 AH is a year in the Islamic calendar that corresponds to 748 – 749 CE.
• main belt asteroid
• radioisotope of iodine
  for medical and pharmaceutical use
• ACP-131 is the controlling publication for listing of Q codes and Z codes
  , as published by NATO Allied countries
• Sonnet 131 by William Shakespeare
• 131 is the medical emergency telephone number in Chile
• United States Citizenship and Immigration Services Form I-131 to apply for a travel document, reentry permit, refugee travel document or advance parole
• 131 is the
  ID3v1 tag equivalent to Indie
  music

See also

• List of highways numbered 131
• United Nations Security Council Resolution 131

References