165155 has 16 divisors (see below), whose sum is σ = 220320. Its totient is φ = 118272.

The previous prime is 165133. The next prime is 165161. The reversal of 165155 is 551561.

165155 = T₃₄ + T₃₅ + ... + T₁₀₀.

165155 = 61² + 62² + ... + 89².

It is a cyclic number.

It is not a de Polignac number, because 165155 - 2¹² = 161059 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165155.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2432 + ... + 2498.

It is an arithmetic number, because the mean of its divisors is an integer number (13770).

2¹⁶⁵¹⁵⁵ is an apocalyptic number.

165155 is a deficient number, since it is larger than the sum of its proper divisors (55165).

165155 is a wasteful number, since it uses less digits than its factorization.

165155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118.

The product of its digits is 750, while the sum is 23.

The square root of 165155 is about 406.3926672567. The cubic root of 165155 is about 54.8652347960.

It can be divided in two parts, 1 and 65155, that added together give a palindrome (65156).

The spelling of 165155 in words is "one hundred sixty-five thousand, one hundred fifty-five".