23131688 has 32 divisors (see below), whose sum is σ = 44595360. Its totient is φ = 11244480.

The previous prime is 23131681. The next prime is 23131699. The reversal of 23131688 is 88613132.

It is a happy number.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (23131681) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 51995 + ... + 52437.

It is an arithmetic number, because the mean of its divisors is an integer number (1393605).

Almost surely, 2^23131688 is an apocalyptic number.

It is an amenable number.

23131688 is a deficient number, since it is larger than the sum of its proper divisors (21463672).

23131688 is a wasteful number, since it uses less digits than its factorization.

23131688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617 (or 613 counting only the distinct ones).

The product of its digits is 6912, while the sum is 32.

The square root of 23131688 is about 4809.5413502745. The cubic root of 23131688 is about 284.9284235972.

The spelling of 23131688 in words is "twenty-three million, one hundred thirty-one thousand, six hundred eighty-eight".