165138824 has 16 divisors (see below), whose sum is σ = 316224000. Its totient is φ = 80812432.

The previous prime is 165138821. The next prime is 165138851. The reversal of 165138824 is 428831561.

165138824 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (165138821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219224 + ... + 219975.

It is an arithmetic number, because the mean of its divisors is an integer number (19764000).

Almost surely, 2^165138824 is an apocalyptic number.

It is an amenable number.

165138824 is a deficient number, since it is larger than the sum of its proper divisors (151085176).

165138824 is a wasteful number, since it uses less digits than its factorization.

165138824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439252 (or 439248 counting only the distinct ones).

The product of its digits is 46080, while the sum is 38.

The square root of 165138824 is about 12850.6351593997. The cubic root of 165138824 is about 548.6344349082.

The spelling of 165138824 in words is "one hundred sixty-five million, one hundred thirty-eight thousand, eight hundred twenty-four".