165125517 has 16 divisors (see below), whose sum is σ = 223111680. Its totient is φ = 108620352.

The previous prime is 165125509. The next prime is 165125537. The reversal of 165125517 is 715521561.

It is a happy number.

It is not a de Polignac number, because 165125517 - 2³ = 165125509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165125537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89668 + ... + 91490.

It is an arithmetic number, because the mean of its divisors is an integer number (13944480).

Almost surely, 2^165125517 is an apocalyptic number.

It is an amenable number.

165125517 is a deficient number, since it is larger than the sum of its proper divisors (57986163).

165125517 is a wasteful number, since it uses less digits than its factorization.

165125517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2212.

The product of its digits is 10500, while the sum is 33.

The square root of 165125517 is about 12850.1173924599. The cubic root of 165125517 is about 548.6196980657.

The spelling of 165125517 in words is "one hundred sixty-five million, one hundred twenty-five thousand, five hundred seventeen".