165155117 has 2 divisors, whose sum is σ = 165155118. Its totient is φ = 165155116.

The previous prime is 165155069. The next prime is 165155129. The reversal of 165155117 is 711551561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102839881 + 62315236 = 10141^2 + 7894^2 .

It is a cyclic number.

It is not a de Polignac number, because 165155117 - 2¹⁶ = 165089581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165155167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82577558 + 82577559.

It is an arithmetic number, because the mean of its divisors is an integer number (82577559).

Almost surely, 2^165155117 is an apocalyptic number.

It is an amenable number.

165155117 is a deficient number, since it is larger than the sum of its proper divisors (1).

165155117 is an equidigital number, since it uses as much as digits as its factorization.

165155117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5250, while the sum is 32.

The square root of 165155117 is about 12851.2690813009. The cubic root of 165155117 is about 548.6524775196.

The spelling of 165155117 in words is "one hundred sixty-five million, one hundred fifty-five thousand, one hundred seventeen".