56515623 has 16 divisors (see below), whose sum is σ = 79522560. Its totient is φ = 35630144.

The previous prime is 56515607. The next prime is 56515637. The reversal of 56515623 is 32651565.

It is a cyclic number.

It is not a de Polignac number, because 56515623 - 2⁴ = 56515607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56515643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1540 + ... + 10742.

It is an arithmetic number, because the mean of its divisors is an integer number (4970160).

Almost surely, 2^56515623 is an apocalyptic number.

56515623 is a deficient number, since it is larger than the sum of its proper divisors (23006937).

56515623 is a wasteful number, since it uses less digits than its factorization.

56515623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9318.

The product of its digits is 27000, while the sum is 33.

The square root of 56515623 is about 7517.6873438578. The cubic root of 56515623 is about 383.7568787118.

It can be divided in two parts, 5651562 and 3, that added together give a palindrome (5651565).

The spelling of 56515623 in words is "fifty-six million, five hundred fifteen thousand, six hundred twenty-three".