57221376 has 36 divisors (see below), whose sum is σ = 152294352. Its totient is φ = 19073536.

The previous prime is 57221357. The next prime is 57221377. The reversal of 57221376 is 67312275.

It is not an unprimeable number, because it can be changed into a prime (57221377) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36486 + ... + 38021.

Almost surely, 2^57221376 is an apocalyptic number.

It is an amenable number.

57221376 is an abundant number, since it is smaller than the sum of its proper divisors (95072976).

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

57221376 is an equidigital number, since it uses as much as digits as its factorization.

57221376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74526 (or 74512 counting only the distinct ones).

The product of its digits is 17640, while the sum is 33.

The square root of 57221376 is about 7564.4812115571. The cubic root of 57221376 is about 385.3476951208.

The spelling of 57221376 in words is "fifty-seven million, two hundred twenty-one thousand, three hundred seventy-six".