56815865 has 8 divisors (see below), whose sum is σ = 71143488. Its totient is φ = 43476400.

The previous prime is 56815859. The next prime is 56815867. The reversal of 56815865 is 56851865.

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

It is not a de Polignac number, because 56815865 - 2⁴ = 56815849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56815867) 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, 246911 + ... + 247140.

It is an arithmetic number, because the mean of its divisors is an integer number (8892936).

Almost surely, 2^56815865 is an apocalyptic number.

It is an amenable number.

56815865 is a deficient number, since it is larger than the sum of its proper divisors (14327623).

56815865 is a wasteful number, since it uses less digits than its factorization.

56815865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494079.

The product of its digits is 288000, while the sum is 44.

The square root of 56815865 is about 7537.6299325451. The cubic root of 56815865 is about 384.4352545283.

The spelling of 56815865 in words is "fifty-six million, eight hundred fifteen thousand, eight hundred sixty-five".