57221353 has 16 divisors (see below), whose sum is σ = 66489984. Its totient is φ = 48234240.

The previous prime is 57221317. The next prime is 57221357. The reversal of 57221353 is 35312275.

It is a cyclic number.

It is not a de Polignac number, because 57221353 - 2⁹ = 57220841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57221357) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180351 + ... + 180667.

It is an arithmetic number, because the mean of its divisors is an integer number (4155624).

Almost surely, 2^57221353 is an apocalyptic number.

It is an amenable number.

57221353 is a deficient number, since it is larger than the sum of its proper divisors (9268631).

57221353 is a wasteful number, since it uses less digits than its factorization.

57221353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672.

The product of its digits is 6300, while the sum is 28.

The square root of 57221353 is about 7564.4796912940. The cubic root of 57221353 is about 385.3476434909.

The spelling of 57221353 in words is "fifty-seven million, two hundred twenty-one thousand, three hundred fifty-three".