183 (number) explained

Number:	183
Divisor:	1, 3, 61, 183

183 (one hundred [and] eighty-three) is the natural number following 182 and preceding 184.

In mathematics

183 is a perfect totient number, a number that is equal to the sum of its iterated totients.

Because

183 = 13 ^{2} + 13 + 1 , it is the number of points in a projective plane over the finite field Z _{13} . 183 is the fourth element of a divisibility sequence 1 , 3 , 13 , 183 , ... in which the n th number a _{n} can be computed as$$a\_n=a\_^2+a\_+1=\backslash bigl\backslash lfloor\; x^\backslash bigr\backslash rfloor,$$for a transcendental number x ≈ 1 . 38509 .^[1] This sequence counts the number of trees of height \le n in which each node can have at most two children.^[2]

There are 183 different semiorders on four labeled elements.

See also

• The year AD 183 or 183 BC
• List of highways numbered 183

Notes and References

1. Dubickas . Artūras . 10.1007/s11139-021-00428-5 . 2 . Ramanujan Journal . 4372232 . 569–581 . Transcendency of some constants related to integer sequences of polynomial iterations . 57 . 2022. 236289092 .
2. Kalman . Stan C. . Kwasny . Barry L. . January 1995 . 10.1080/09540099508915657 . 1 . Connection Science . 61–80 . Tail-recursive distributed representations and simple recurrent networks . 7.