56801565 has 24 divisors (see below), whose sum is σ = 98966400. Its totient is φ = 30137184.

The previous prime is 56801561. The next prime is 56801567. The reversal of 56801565 is 56510865.

It is not a de Polignac number, because 56801565 - 2² = 56801561 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56801561) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5784 + ... + 12126.

It is an arithmetic number, because the mean of its divisors is an integer number (4123600).

Almost surely, 2^56801565 is an apocalyptic number.

It is an amenable number.

56801565 is a deficient number, since it is larger than the sum of its proper divisors (42164835).

56801565 is a wasteful number, since it uses less digits than its factorization.

56801565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6553 (or 6550 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The square root of 56801565 is about 7536.6812988211. The cubic root of 56801565 is about 384.4029989519.

The spelling of 56801565 in words is "fifty-six million, eight hundred one thousand, five hundred sixty-five".