521372964 has 48 divisors (see below), whose sum is σ = 1391817728. Its totient is φ = 148804128.

The previous prime is 521372923. The next prime is 521372981. The reversal of 521372964 is 469273125.

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 15 ways as a sum of consecutive naturals, for example, 91569 + ... + 97095.

Almost surely, 2^521372964 is an apocalyptic number.

It is an amenable number.

521372964 is an abundant number, since it is smaller than the sum of its proper divisors (870444764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

521372964 is a wasteful number, since it uses less digits than its factorization.

521372964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6664 (or 6662 counting only the distinct ones).

The product of its digits is 90720, while the sum is 39.

The square root of 521372964 is about 22833.5928841696. The cubic root of 521372964 is about 804.8522620229.

The spelling of 521372964 in words is "five hundred twenty-one million, three hundred seventy-two thousand, nine hundred sixty-four".