56565623 has 4 divisors (see below), whose sum is σ = 56631000. Its totient is φ = 56500248.

The previous prime is 56565617. The next prime is 56565667. The reversal of 56565623 is 32656565.

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

It is a cyclic number.

It is not a de Polignac number, because 56565623 - 2²⁰ = 55517047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56565023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31373 + ... + 33126.

It is an arithmetic number, because the mean of its divisors is an integer number (14157750).

Almost surely, 2^56565623 is an apocalyptic number.

56565623 is a deficient number, since it is larger than the sum of its proper divisors (65377).

56565623 is an equidigital number, since it uses as much as digits as its factorization.

56565623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65376.

The product of its digits is 162000, while the sum is 38.

The square root of 56565623 is about 7521.0120994451. The cubic root of 56565623 is about 383.8700166793.

It can be divided in two parts, 5656562 and 3, that added together give a palindrome (5656565).

The spelling of 56565623 in words is "fifty-six million, five hundred sixty-five thousand, six hundred twenty-three".