171 (number)

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

← 170 171 172 →
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Cardinal	one hundred seventy-one
Ordinal	171st (one hundred seventy-first)
Factorization	3^2 × 19
Divisors	1, 3, 9, 19, 57, 171
Greek numeral	ΡΟΑ´
Roman numeral	CLXXI
Binary	101010112
Ternary	201003
Octal	2538
Duodecimal	12312
Hexadecimal	AB16

In mathematics

171 is an odd number, a composite number, and a deficient number. It is also a triangular number, a tridecagonal number[1] 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).

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 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 (Titanium dioxide)
• In binary form (10101011), the preamble in a Specific Area Message Encoding header in the Emergency Alert System
• The Compaq 171FS computer monitor
• JWH-171, an analgesic drug that acts as a cannabinoid receptor agonist
• Minuscule 171, a Greek minuscule manuscript of the New Testament, on parchment
• SJK 171, one of the earliest New York City graffiti artists of the late 1960s and 1970s
• 171, the Venezuelan emergency telephone number

See also

• 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

References

1. "Sloane's A051865 : 13-gonal (or tridecagonal) numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-28.