521230656 has 28 divisors (see below), whose sum is σ = 1379089952. Its totient is φ = 173743488.

The previous prime is 521230651. The next prime is 521230657. The reversal of 521230656 is 656032125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521230651) 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, 1357180 + ... + 1357563.

Almost surely, 2^521230656 is an apocalyptic number.

It is an amenable number.

521230656 is an abundant number, since it is smaller than the sum of its proper divisors (857859296).

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

521230656 is a wasteful number, since it uses less digits than its factorization.

521230656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2714758 (or 2714748 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 521230656 is about 22830.4764733459. The cubic root of 521230656 is about 804.7790276040.

The spelling of 521230656 in words is "five hundred twenty-one million, two hundred thirty thousand, six hundred fifty-six".