56957591 has 8 divisors (see below), whose sum is σ = 60409824. Its totient is φ = 53586720.

The previous prime is 56957587. The next prime is 56957617. The reversal of 56957591 is 19575965.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56957591 - 2² = 56957587 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56917591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18896 + ... + 21701.

It is an arithmetic number, because the mean of its divisors is an integer number (7551228).

Almost surely, 2^56957591 is an apocalyptic number.

56957591 is a deficient number, since it is larger than the sum of its proper divisors (3452233).

56957591 is a wasteful number, since it uses less digits than its factorization.

56957591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40681.

The product of its digits is 425250, while the sum is 47.

The square root of 56957591 is about 7547.0253080270. The cubic root of 56957591 is about 384.7546443683.

It can be divided in two parts, 5 and 6957591, that added together give a palindrome (6957596).

The spelling of 56957591 in words is "fifty-six million, nine hundred fifty-seven thousand, five hundred ninety-one".