72131804 has 6 divisors (see below), whose sum is σ = 126230664. Its totient is φ = 36065900.

The previous prime is 72131797. The next prime is 72131821. The reversal of 72131804 is 40813127.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9016472 + ... + 9016479.

It is an arithmetic number, because the mean of its divisors is an integer number (21038444).

Almost surely, 2^72131804 is an apocalyptic number.

It is an amenable number.

72131804 is a deficient number, since it is larger than the sum of its proper divisors (54098860).

72131804 is a wasteful number, since it uses less digits than its factorization.

72131804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18032955 (or 18032953 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 72131804 is about 8493.0444482529. The cubic root of 72131804 is about 416.2704648351.

The spelling of 72131804 in words is "seventy-two million, one hundred thirty-one thousand, eight hundred four".