56811865 has 8 divisors (see below), whose sum is σ = 74371968. Its totient is φ = 41317680.

The previous prime is 56811829. The next prime is 56811883.

56811865 is nontrivially palindromic in base 10.

56811865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 56811865 - 2⁹ = 56811353 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 516417 + ... + 516526.

It is an arithmetic number, because the mean of its divisors is an integer number (9296496).

Almost surely, 2^56811865 is an apocalyptic number.

56811865 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

56811865 is a deficient number, since it is larger than the sum of its proper divisors (17560103).

56811865 is a wasteful number, since it uses less digits than its factorization.

56811865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1032959.

The product of its digits is 57600, while the sum is 40.

The square root of 56811865 is about 7537.3645924819. The cubic root of 56811865 is about 384.4262325347.

The spelling of 56811865 in words is "fifty-six million, eight hundred eleven thousand, eight hundred sixty-five".