57221272 has 16 divisors (see below), whose sum is σ = 107478000. Its totient is φ = 28560480.

The previous prime is 57221267. The next prime is 57221287. The reversal of 57221272 is 27212275.

It is a self number, because there is not a number n which added to its sum of digits gives 57221272.

It is a congruent number.

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, 1179 + ... + 10762.

It is an arithmetic number, because the mean of its divisors is an integer number (6717375).

Almost surely, 2^57221272 is an apocalyptic number.

It is an amenable number.

57221272 is a deficient number, since it is larger than the sum of its proper divisors (50256728).

57221272 is a wasteful number, since it uses less digits than its factorization.

57221272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12546 (or 12542 counting only the distinct ones).

The product of its digits is 3920, while the sum is 28.

The square root of 57221272 is about 7564.4743373218. The cubic root of 57221272 is about 385.3474616638.

The spelling of 57221272 in words is "fifty-seven million, two hundred twenty-one thousand, two hundred seventy-two".