521399488 has 14 divisors (see below), whose sum is σ = 1034652236. Its totient is φ = 260699712.

The previous prime is 521399479. The next prime is 521399521. The reversal of 521399488 is 884993125.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4073370 + ... + 4073497.

Almost surely, 2^521399488 is an apocalyptic number.

It is an amenable number.

521399488 is a deficient number, since it is larger than the sum of its proper divisors (513252748).

521399488 is an equidigital number, since it uses as much as digits as its factorization.

521399488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8146879 (or 8146869 counting only the distinct ones).

The product of its digits is 622080, while the sum is 49.

The square root of 521399488 is about 22834.1736876989. The cubic root of 521399488 is about 804.8659103073.

The spelling of 521399488 in words is "five hundred twenty-one million, three hundred ninety-nine thousand, four hundred eighty-eight".