56811287 has 8 divisors (see below), whose sum is σ = 61501104. Its totient is φ = 52167168.

The previous prime is 56811269. The next prime is 56811341. The reversal of 56811287 is 78211865.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56811287 - 2⁸ = 56811031 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56811287.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56811217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8813 + ... + 13830.

It is an arithmetic number, because the mean of its divisors is an integer number (7687638).

Almost surely, 2^56811287 is an apocalyptic number.

56811287 is a deficient number, since it is larger than the sum of its proper divisors (4689817).

56811287 is a wasteful number, since it uses less digits than its factorization.

56811287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22849.

The product of its digits is 26880, while the sum is 38.

The square root of 56811287 is about 7537.3262500704. The cubic root of 56811287 is about 384.4249288216.

The spelling of 56811287 in words is "fifty-six million, eight hundred eleven thousand, two hundred eighty-seven".