56155579 has 4 divisors (see below), whose sum is σ = 56224800. Its totient is φ = 56086360.

The previous prime is 56155543. The next prime is 56155591. The reversal of 56155579 is 97555165.

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 56155579 - 2²⁵ = 22601147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56158579) 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, 33379 + ... + 35020.

It is an arithmetic number, because the mean of its divisors is an integer number (14056200).

Almost surely, 2^56155579 is an apocalyptic number.

56155579 is a deficient number, since it is larger than the sum of its proper divisors (69221).

56155579 is an equidigital number, since it uses as much as digits as its factorization.

56155579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69220.

The product of its digits is 236250, while the sum is 43.

The square root of 56155579 is about 7493.7026228694. The cubic root of 56155579 is about 382.9402088604.

The spelling of 56155579 in words is "fifty-six million, one hundred fifty-five thousand, five hundred seventy-nine".