56560591 has 4 divisors (see below), whose sum is σ = 56786184. Its totient is φ = 56335000.

The previous prime is 56560583. The next prime is 56560597. The reversal of 56560591 is 19506565.

56560591 is nontrivially palindromic in base 3.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 56560591 - 2³ = 56560583 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56560591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56560597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112420 + ... + 112921.

It is an arithmetic number, because the mean of its divisors is an integer number (14196546).

Almost surely, 2^56560591 is an apocalyptic number.

56560591 is a deficient number, since it is larger than the sum of its proper divisors (225593).

56560591 is a wasteful number, since it uses less digits than its factorization.

56560591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225592.

The product of its (nonzero) digits is 40500, while the sum is 37.

The square root of 56560591 is about 7520.6775625604. The cubic root of 56560591 is about 383.8586334922.

The spelling of 56560591 in words is "fifty-six million, five hundred sixty thousand, five hundred ninety-one".