521972392 has 32 divisors (see below), whose sum is σ = 1024682400. Its totient is φ = 248941504.

The previous prime is 521972377. The next prime is 521972441. The reversal of 521972392 is 293279125.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5703 + ... + 32809.

It is an arithmetic number, because the mean of its divisors is an integer number (32021325).

Almost surely, 2^521972392 is an apocalyptic number.

It is an amenable number.

521972392 is a deficient number, since it is larger than the sum of its proper divisors (502710008).

521972392 is a wasteful number, since it uses less digits than its factorization.

521972392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27225 (or 27221 counting only the distinct ones).

The product of its digits is 68040, while the sum is 40.

The square root of 521972392 is about 22846.7151249365. The cubic root of 521972392 is about 805.1605929364.

The spelling of 521972392 in words is "five hundred twenty-one million, nine hundred seventy-two thousand, three hundred ninety-two".