521297364 has 48 divisors (see below), whose sum is σ = 1434976256. Its totient is φ = 144136800.

The previous prime is 521297327. The next prime is 521297377. The reversal of 521297364 is 463792125.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97492 + ... + 102699.

Almost surely, 2^521297364 is an apocalyptic number.

It is an amenable number.

521297364 is an abundant number, since it is smaller than the sum of its proper divisors (913678892).

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

521297364 is a wasteful number, since it uses less digits than its factorization.

521297364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200236 (or 200234 counting only the distinct ones).

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

The square root of 521297364 is about 22831.9373685196. The cubic root of 521297364 is about 804.8133584763.

The spelling of 521297364 in words is "five hundred twenty-one million, two hundred ninety-seven thousand, three hundred sixty-four".