521325456 has 20 divisors (see below), whose sum is σ = 1346757552. Its totient is φ = 173775136.

The previous prime is 521325391. The next prime is 521325463. The reversal of 521325456 is 654523125.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5430426 + ... + 5430521.

Almost surely, 2^521325456 is an apocalyptic number.

It is an amenable number.

521325456 is an abundant number, since it is smaller than the sum of its proper divisors (825432096).

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

521325456 is a wasteful number, since it uses less digits than its factorization.

521325456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10860958 (or 10860952 counting only the distinct ones).

The product of its digits is 36000, while the sum is 33.

The square root of 521325456 is about 22832.5525511275. The cubic root of 521325456 is about 804.8278149793.

The spelling of 521325456 in words is "five hundred twenty-one million, three hundred twenty-five thousand, four hundred fifty-six".