171 (number)

← 170 171 172 →
← 170 171 172 173 174 175 176 177 178 179 → List of numbers — Integers ← 0 100 200 300 400 500 600 700 800 900 →
Cardinal	one hundred seventy-one
Ordinal	171st (one hundred and seventy-first)
Factorization	32× 19
Divisors	1, 3, 9, 19, 57, 171
Roman numeral	CLXXI
Binary	101010112
Ternary	201003
Quaternary	22234
Quinary	11415
Senary	4436
Octal	2538
Duodecimal	12312
Hexadecimal	AB16
Vigesimal	8B20
Base 36	4R36

171 (one hundred [and] seventy-one) is the natural number following 170 and preceding 172.

In mathematics

171 is an odd number, a composite number, and a deficient number. It is also a triangular number, a tridecagonal number and a 58-gonal number.

171 is a Harshad number, a palindromic number, and an undulating number. 171 is a repdigit in base 7 (333), and also in bases 18, 56, and 170.

In astronomy

• 171P/Spahr is a periodic comet in our solar system
• 171 Ophelia is a main belt asteroid, a member of the Themis family of asteroids

In geography

• Fox Valley No. 171, Saskatchewan, Canada

In the military

• 171st Air Refueling Squadron unit of the Michigan Air National Guard flies the KC-135T Stratotanker
• US Air Force 171st Air Refueling Wing Air Mobility Command unit of the Pennsylvania Air National Guard
• 171st Battalion was a unit based in Quebec City, Quebec in the Canadian Expeditionary Force during World War I
• US Army 171st Infantry Brigade based at Fort Jackson, South Carolina
• USS Burns (DD-171) was a United States Navy Wickes class destroyer following World War I
• USS Carroll (DE-171) was a United States Navy Cannon-class destroyer escort during World War II
• USS Claiborne (AK-171) was a United States Navy Alamosa-class cargo ship during World War II
• USS Cuttlefish (SS-171) was a United States Navy Cachalot-class submarine during World War II
• USS Granville (APA-171) was a United States Navy Haskell-class attack transport during World War II
• USS Quest (SP-171) was a United States Navy patrol boat during World War I
• USS Storm King (AP-171) was a United States Navy Storm King class auxiliary transport during World War II
• Australian Army 171st Aviation Squadron helicopter squadron at Holsworthy Barracks near Sydney

In the penal code

• Section 171 of the Cyprus Penal code
• Article 171 of the Penal code of Brazil, defines the crime of estelionato (defrauding the unwary, i.e. a "scam" or "confidence trick"). Because of it, in Brazilian Portuguese, um-sete-um (literally, one-seven-one) became a synonym for "scam", and also "swindler" or "compulsive liar".
• Article 171 of the Philippines Penal Code (falsification of public documents)

In sports

• Johnny Bright rushed for a record 171 yards in the Canadian Football League 44th Grey Cup game on November 24, 1956

In transportation

• British Rail Class 171
• London Buses route 171
• SMRT Bus Service 171

In other fields

171 is also:

• The year AD 171 or 171 BC
• E171 is Titanium dioxide
• The Compaq 171FS computer monitor
• JWH-171 is an analgesic drug that acts as a cannabinoid receptor agonist
• Minuscule 171 is a Greek minuscule manuscript of the New Testament, on parchment
• SJK 171 was one of the earliest New York City graffiti artists of the late 1960s and 1970s
• 171 is the Venezuelan emergency telephone number

See also

• Mike 171
• List of highways numbered 171
• United States Supreme Court cases, Volume 171
• United Nations Security Council Resolution 171

External links

• Number Facts and Trivia: 171
• Number Gossip: 171
• The Number 171
• The Positive Integer 171
• VirtueScience: 171
• Locomotive 171 Restoration Project