521253320 has 64 divisors (see below), whose sum is σ = 1419223680. Its totient is φ = 168201216.

The previous prime is 521253307. The next prime is 521253349. The reversal of 521253320 is 23352125.

It is a super-2 number, since 2×521253320² = 543410047222044800, which contains 22 as substring.

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, 49994 + ... + 59513.

It is an arithmetic number, because the mean of its divisors is an integer number (22175370).

Almost surely, 2^521253320 is an apocalyptic number.

It is an amenable number.

521253320 is an abundant number, since it is smaller than the sum of its proper divisors (897970360).

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

521253320 is a wasteful number, since it uses less digits than its factorization.

521253320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109542 (or 109538 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 521253320 is about 22830.9728220240. The cubic root of 521253320 is about 804.7906918243.

The spelling of 521253320 in words is "five hundred twenty-one million, two hundred fifty-three thousand, three hundred twenty".