56751565 has 16 divisors (see below), whose sum is σ = 73887408. Its totient is φ = 41596416.

The previous prime is 56751551. The next prime is 56751619. The reversal of 56751565 is 56515765.

It can be written as a sum of positive squares in 8 ways, for example, as 110889 + 56640676 = 333^2 + 7526^2 .

It is a cyclic number.

It is not a de Polignac number, because 56751565 - 2¹³ = 56743373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5719 + ... + 12091.

It is an arithmetic number, because the mean of its divisors is an integer number (4617963).

Almost surely, 2^56751565 is an apocalyptic number.

It is an amenable number.

56751565 is a deficient number, since it is larger than the sum of its proper divisors (17135843).

56751565 is a wasteful number, since it uses less digits than its factorization.

56751565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6528.

The product of its digits is 157500, while the sum is 40.

The square root of 56751565 is about 7533.3634586418. The cubic root of 56751565 is about 384.2901746411.

The spelling of 56751565 in words is "fifty-six million, seven hundred fifty-one thousand, five hundred sixty-five".