56564155 has 4 divisors (see below), whose sum is σ = 67876992. Its totient is φ = 45251320.

The previous prime is 56564099. The next prime is 56564177. The reversal of 56564155 is 55146565.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55146565 = 5 ⋅11029313.

It is not a de Polignac number, because 56564155 - 2¹³ = 56555963 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 5656411 + ... + 5656420.

It is an arithmetic number, because the mean of its divisors is an integer number (16969248).

Almost surely, 2^56564155 is an apocalyptic number.

56564155 is a deficient number, since it is larger than the sum of its proper divisors (11312837).

56564155 is a wasteful number, since it uses less digits than its factorization.

56564155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11312836.

The product of its digits is 90000, while the sum is 37.

The square root of 56564155 is about 7520.9145055638. The cubic root of 56564155 is about 383.8666958988.

The spelling of 56564155 in words is "fifty-six million, five hundred sixty-four thousand, one hundred fifty-five".