56556505 has 4 divisors (see below), whose sum is σ = 67867812. Its totient is φ = 45245200.

The previous prime is 56556491. The next prime is 56556523. The reversal of 56556505 is 50565565.

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

It can be written as a sum of positive squares in 2 ways, for example, as 34999056 + 21557449 = 5916^2 + 4643^2 .

It is not a de Polignac number, because 56556505 - 2⁵ = 56556473 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 (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5655646 + ... + 5655655.

It is an arithmetic number, because the mean of its divisors is an integer number (16966953).

Almost surely, 2^56556505 is an apocalyptic number.

It is an amenable number.

56556505 is a deficient number, since it is larger than the sum of its proper divisors (11311307).

56556505 is a wasteful number, since it uses less digits than its factorization.

56556505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11311306.

The product of its (nonzero) digits is 112500, while the sum is 37.

The square root of 56556505 is about 7520.4059065984. The cubic root of 56556505 is about 383.8493898114.

The spelling of 56556505 in words is "fifty-six million, five hundred fifty-six thousand, five hundred five".