521989312 has 28 divisors (see below), whose sum is σ = 1115502976. Its totient is φ = 240917760.

The previous prime is 521989289. The next prime is 521989331. The reversal of 521989312 is 213989125.

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, 312864 + ... + 314527.

It is an arithmetic number, because the mean of its divisors is an integer number (39839392).

Almost surely, 2^521989312 is an apocalyptic number.

521989312 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

521989312 is an abundant number, since it is smaller than the sum of its proper divisors (593513664).

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

521989312 is a wasteful number, since it uses less digits than its factorization.

521989312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627416 (or 627406 counting only the distinct ones).

The product of its digits is 38880, while the sum is 40.

The square root of 521989312 is about 22847.0854158687. The cubic root of 521989312 is about 805.1692927388.

The spelling of 521989312 in words is "five hundred twenty-one million, nine hundred eighty-nine thousand, three hundred twelve".