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165 (number)

From Wikipedia, the free encyclopedia

Natural number

165

←160 161 162 163 164 165 166 167 168 169 →

←0 100 200 300 400 500 600 700 800 900 →

one hundred sixty-five

165th
(one hundred sixty-fifth)

3 × 5 × 11

1, 3, 5, 11, 15, 33, 55, 165

ΡΞΕ´

CLXV,clxv

10100101₂

20010₃

433₆

245₈

119₁₂

A5₁₆

165 (one hundred [and] sixty-five) is thenatural number following164 and preceding166.

In mathematics

165 is:

anodd number, acomposite number, and adeficient number.
asphenic number.
atetrahedral number.^[1]
the number of prime knots with 10 crossings.^[2]
the sum of the sums of the divisors of the first 14positive integers.^[3]
aself number inbase 10.
apalindromic number inbinary (10100101₂) and bases 14 (BB₁₄), 32 (55₃₂) and 54 (33₅₄).
aunique period in base 2.
the number of Wikipedias (including closed and deleted ones).

References

^"Sloane's A000292 : Tetrahedral numbers".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2016-05-28.
^Sloane, N. J. A. (ed.)."Sequence A002863 (Number of prime knots with n crossings)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation.
^Sloane, N. J. A. (ed.)."Sequence A024916 (sum_{k=1..n} sigma(k) where sigma(n) = sum of divisors of n)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation.

External links

Wikimedia Commons has media related to165 (number).

Number Facts and Trivia: 165
The Number 165
The Positive Integer 165
VirtueScience: 165 Archived 2021-01-21 at theWayback Machine

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