56599421 has 4 divisors (see below), whose sum is σ = 57803712. Its totient is φ = 55395132.

The previous prime is 56599391. The next prime is 56599429. The reversal of 56599421 is 12499565.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56599421 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56599429) 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, 602075 + ... + 602168.

It is an arithmetic number, because the mean of its divisors is an integer number (14450928).

Almost surely, 2^56599421 is an apocalyptic number.

It is an amenable number.

56599421 is a deficient number, since it is larger than the sum of its proper divisors (1204291).

56599421 is a wasteful number, since it uses less digits than its factorization.

56599421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1204290.

The product of its digits is 97200, while the sum is 41.

The square root of 56599421 is about 7523.2586689546. The cubic root of 56599421 is about 383.9464556599.

The spelling of 56599421 in words is "fifty-six million, five hundred ninety-nine thousand, four hundred twenty-one".