23215656 has 16 divisors (see below), whose sum is σ = 58039200. Its totient is φ = 7738544.

The previous prime is 23215597. The next prime is 23215667. The reversal of 23215656 is 65651232.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 483636 + ... + 483683.

It is an arithmetic number, because the mean of its divisors is an integer number (3627450).

Almost surely, 2^23215656 is an apocalyptic number.

It is an amenable number.

23215656 is an abundant number, since it is smaller than the sum of its proper divisors (34823544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23215656 is a wasteful number, since it uses less digits than its factorization.

23215656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 967328 (or 967324 counting only the distinct ones).

The product of its digits is 10800, while the sum is 30.

The square root of 23215656 is about 4818.2627574677. The cubic root of 23215656 is about 285.2727705529.

Adding to 23215656 its reverse (65651232), we get a palindrome (88866888).

It can be divided in two parts, 23215 and 656, that added together give a triangular number (23871 = T₂₁₈).

The spelling of 23215656 in words is "twenty-three million, two hundred fifteen thousand, six hundred fifty-six".