56817965 has 4 divisors (see below), whose sum is σ = 68181564. Its totient is φ = 45454368.

The previous prime is 56817941. The next prime is 56817967. The reversal of 56817965 is 56971865.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 42172036 + 14645929 = 6494^2 + 3827^2 .

It is a cyclic number.

It is not a de Polignac number, because 56817965 - 2¹⁶ = 56752429 is a prime.

It is a super-2 number, since 2×56817965² = 6456562293482450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56817967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5681792 + ... + 5681801.

It is an arithmetic number, because the mean of its divisors is an integer number (17045391).

Almost surely, 2^56817965 is an apocalyptic number.

It is an amenable number.

56817965 is a deficient number, since it is larger than the sum of its proper divisors (11363599).

56817965 is a wasteful number, since it uses less digits than its factorization.

56817965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11363598.

The product of its digits is 453600, while the sum is 47.

The square root of 56817965 is about 7537.7692323392. The cubic root of 56817965 is about 384.4399909054.

The spelling of 56817965 in words is "fifty-six million, eight hundred seventeen thousand, nine hundred sixty-five".