57321320 has 32 divisors (see below), whose sum is σ = 147398400. Its totient is φ = 19652928.

The previous prime is 57321317. The next prime is 57321337. The reversal of 57321320 is 2312375.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102080 + ... + 102639.

It is an arithmetic number, because the mean of its divisors is an integer number (4606200).

Almost surely, 2^57321320 is an apocalyptic number.

It is an amenable number.

57321320 is an abundant number, since it is smaller than the sum of its proper divisors (90077080).

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

57321320 is a wasteful number, since it uses less digits than its factorization.

57321320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204737 (or 204733 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 23.

The square root of 57321320 is about 7571.0844665741. The cubic root of 57321320 is about 385.5719166258.

Adding to 57321320 its reverse (2312375), we get a palindrome (59633695).

The spelling of 57321320 in words is "fifty-seven million, three hundred twenty-one thousand, three hundred twenty".