| ||||
|---|---|---|---|---|
| Cardinal | one hundred sixty-five | |||
| Ordinal | 165th (one hundred sixty-fifth) | |||
| Factorization | 3 × 5 × 11 | |||
| Divisors | 1, 3, 5, 11, 15, 33, 55, 165 | |||
| Greek numeral | ΡΞΕ´ | |||
| Roman numeral | CLXV | |||
| Binary | 101001012 | |||
| Ternary | 200103 | |||
| Senary | 4336 | |||
| Octal | 2458 | |||
| Duodecimal | 11912 | |||
| Hexadecimal | A516 | |||
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 the Solar System
- The planet Neptune takes about 165 years to orbit the Sun.
In the military
- Caproni Ca.165 Italian fighter aircraft developed before World War II
- 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
- 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 early 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
References
- ↑ "Sloane's A000292 : Tetrahedral numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-28.
- ↑ Sloane, N. J. A. (ed.). "Sequence 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
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