56565511 has 16 divisors (see below), whose sum is σ = 61737984. Its totient is φ = 51617664.

The previous prime is 56565503. The next prime is 56565517. The reversal of 56565511 is 11556565.

It is a cyclic number.

It is not a de Polignac number, because 56565511 - 2³ = 56565503 is a prime.

It is a super-2 number, since 2×56565511² = 6399314069382242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56565517) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162840 + ... + 163186.

It is an arithmetic number, because the mean of its divisors is an integer number (3858624).

Almost surely, 2^56565511 is an apocalyptic number.

56565511 is a deficient number, since it is larger than the sum of its proper divisors (5172473).

56565511 is a wasteful number, since it uses less digits than its factorization.

56565511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630.

The product of its digits is 22500, while the sum is 34.

The square root of 56565511 is about 7521.0046536350. The cubic root of 56565511 is about 383.8697633248.

The spelling of 56565511 in words is "fifty-six million, five hundred sixty-five thousand, five hundred eleven".