165307538 has 16 divisors (see below), whose sum is σ = 272743200. Its totient is φ = 75138580.

The previous prime is 165307517. The next prime is 165307553. The reversal of 165307538 is 835703561.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28388 + ... + 33711.

It is an arithmetic number, because the mean of its divisors is an integer number (17046450).

Almost surely, 2^165307538 is an apocalyptic number.

165307538 is a deficient number, since it is larger than the sum of its proper divisors (107435662).

165307538 is an equidigital number, since it uses as much as digits as its factorization.

165307538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62134 (or 62112 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 165307538 is about 12857.1979062314. The cubic root of 165307538 is about 548.8212086856.

It can be divided in two parts, 165 and 307538, that added together give a palindrome (307703).

The spelling of 165307538 in words is "one hundred sixty-five million, three hundred seven thousand, five hundred thirty-eight".