57087217 has 16 divisors (see below), whose sum is σ = 63590400. Its totient is φ = 50815440.

The previous prime is 57087209. The next prime is 57087221. The reversal of 57087217 is 71278075.

It is a cyclic number.

It is not a de Polignac number, because 57087217 - 2³ = 57087209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57087227) 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, 155368 + ... + 155734.

It is an arithmetic number, because the mean of its divisors is an integer number (3974400).

Almost surely, 2^57087217 is an apocalyptic number.

It is an amenable number.

57087217 is a deficient number, since it is larger than the sum of its proper divisors (6503183).

57087217 is a wasteful number, since it uses less digits than its factorization.

57087217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636.

The product of its (nonzero) digits is 27440, while the sum is 37.

The square root of 57087217 is about 7555.6083143583. The cubic root of 57087217 is about 385.0463024089.

The spelling of 57087217 in words is "fifty-seven million, eighty-seven thousand, two hundred seventeen".