165 (number)

← 164 165 166 →
← 160 161 162 163 164 165 166 167 168 169 → List of numbers — Integers ← 0 100 200 300 400 500 600 700 800 900 →
Cardinal	one hundred sixty-five
Ordinal	165th (one hundred and sixty-fifth)
Factorization	3 × 5 × 11
Divisors	1, 3, 5, 11, 15, 33, 55, 165
Roman numeral	CLXV
Binary	101001012
Ternary	200103
Quaternary	22114
Quinary	11305
Senary	4336
Octal	2458
Duodecimal	11912
Hexadecimal	A516
Vigesimal	8520
Base 36	4L36

165 (one hundred [and] sixty-five) is the natural number following 164 and preceding 166.

In mathematics

165 is:

• an odd number, a composite number, and a deficient number.
• a sphenic number.
• a tetrahedral number^[1]
• the sum of the sums of the divisors of the first 14 positive integers.^[2]
• a self number in base 10.
• a palindromic number in binary (10100101₂) and bases 14 (BB₁₄), 32 (55₃₂) and 54 (33₅₄).
• a unique period in base 2.

In astronomy

• 165 Loreley is a large Main belt asteroid
• 165P/LINEAR is a periodic comet in our solar system

In the military

• USNS American Explorer (T-AOT-165) was a United States Navy tanker, part of the U.S. Reserve Fleet, Beaumont, Texas
• USS Bonita (SS-165) was a United States Navy Barracuda-class submarine during World War II
• USS Bullock (AK-165) was a United States Navy Alamosa-class cargo ship during World War II
• USS Counsel (AM-165) was a United States Navy Admirable-class minesweeper during World War II
• USS Counsel (AM-165) was a United States Navy Haskell-class attack transport during World War II
• USS Flicker (IX-165) was a United States Navy minesweeper during World War II
• USS Georgetown (AG-165) was a United States Navy Oxford-class technical research ship following World War II
• USS Meredith (DD-165) was a United States Navy Wickes class destroyer during World War I
• USS Parks (DE-165) was a United States Navy Cannon class destroyer escort during World War II
• USS Prince Georges (AP-165) was a United States Navy Crater-class transport and cargo ship during World War II
• USS Wenonah (SP-165) was a United States Navy yacht during World War I
• Caproni Ca.165 Italian fighter aircraft developed before World War II
• The 165 Squadron, Republic of Singapore Air Force Air Defence Operations Command, Republic of Singapore Air Force

In transportation

• British Rail Class 165
• The Blériot 165 was a French four-engine biplane airliner of the 1920s
• The Cessna 165 single-engine plane of the 1930s
• LOT Polish Airlines Flight 165, en route from Warsaw to Cracow Balice airport crashed during a snowstorm on April 2, 1969

In other fields

165 is also:

• The year AD 165 or 165 BC
• 165 AH is a year in the Islamic calendar that corresponds to 781 – 782 CE
• The atomic number of an element temporarily called Unhexpentium
• G.165 is a Telecommunication Standardization Sector standard for echo cancellers, used in telephony
• The human gene Zinc finger protein 165, or ZNF165

See also

• List of highways numbered 165
• United States Supreme Court cases, Volume 165
• United Nations Security Council Resolution 165
• Pennsylvania House of Representatives, District 165
• U.S. Income Tax sections 165(d) Professional Gamblers and 165(d) Recreational Gamblers

References

1. "Sloane's A000292 : Tetrahedral numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-28.
2. "Sloane's A024916 : sum_{k=1..n} sigma(k) where sigma(n) = sum of divisors of n". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.

External links

• Number Facts and Trivia: 165
• The Number 165
• The Positive Integer 165
• VirtueScience: 165