56511567 has 32 divisors (see below), whose sum is σ = 100723200. Its totient is φ = 30590784.

The previous prime is 56511551. The next prime is 56511577. The reversal of 56511567 is 76511565.

It is not a de Polignac number, because 56511567 - 2⁴ = 56511551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56511577) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4278 + ... + 11459.

It is an arithmetic number, because the mean of its divisors is an integer number (3147600).

Almost surely, 2^56511567 is an apocalyptic number.

56511567 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

56511567 is a deficient number, since it is larger than the sum of its proper divisors (44211633).

56511567 is a wasteful number, since it uses less digits than its factorization.

56511567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15772 (or 15766 counting only the distinct ones).

The product of its digits is 31500, while the sum is 36.

The square root of 56511567 is about 7517.4175752049. The cubic root of 56511567 is about 383.7476980343.

The spelling of 56511567 in words is "fifty-six million, five hundred eleven thousand, five hundred sixty-seven".