56590581 has 4 divisors (see below), whose sum is σ = 75454112. Its totient is φ = 37727052.

The previous prime is 56590577. The next prime is 56590601. The reversal of 56590581 is 18509565.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 56590581 - 2² = 56590577 is a prime.

It is a super-2 number, since 2×56590581² = 6404987715835122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56590081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9431761 + ... + 9431766.

It is an arithmetic number, because the mean of its divisors is an integer number (18863528).

Almost surely, 2^56590581 is an apocalyptic number.

It is an amenable number.

56590581 is a deficient number, since it is larger than the sum of its proper divisors (18863531).

56590581 is a wasteful number, since it uses less digits than its factorization.

56590581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18863530.

The product of its (nonzero) digits is 54000, while the sum is 39.

The square root of 56590581 is about 7522.6711346436. The cubic root of 56590581 is about 383.9264656829.

The spelling of 56590581 in words is "fifty-six million, five hundred ninety thousand, five hundred eighty-one".