57320565 has 32 divisors (see below), whose sum is σ = 94003200. Its totient is φ = 29816640.

The previous prime is 57320551. The next prime is 57320567. The reversal of 57320565 is 56502375.

It is not a de Polignac number, because 57320565 - 2¹¹ = 57318517 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57320567) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 211380 + ... + 211650.

It is an arithmetic number, because the mean of its divisors is an integer number (2937600).

Almost surely, 2^57320565 is an apocalyptic number.

It is an amenable number.

57320565 is a deficient number, since it is larger than the sum of its proper divisors (36682635).

57320565 is a wasteful number, since it uses less digits than its factorization.

57320565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577.

The product of its (nonzero) digits is 31500, while the sum is 33.

The square root of 57320565 is about 7571.0346056533. The cubic root of 57320565 is about 385.5702237823.

The spelling of 57320565 in words is "fifty-seven million, three hundred twenty thousand, five hundred sixty-five".