23881631 has 4 divisors (see below), whose sum is σ = 24218064. Its totient is φ = 23545200.

The previous prime is 23881609. The next prime is 23881667. The reversal of 23881631 is 13618832.

It is a happy number.

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 23881631 - 2¹⁸ = 23619487 is a prime.

It is a super-2 number, since 2×23881631² = 1140664598440322, 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 (23881601) 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, 168110 + ... + 168251.

It is an arithmetic number, because the mean of its divisors is an integer number (6054516).

Almost surely, 2^23881631 is an apocalyptic number.

23881631 is a deficient number, since it is larger than the sum of its proper divisors (336433).

23881631 is an equidigital number, since it uses as much as digits as its factorization.

23881631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336432.

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

The square root of 23881631 is about 4886.8835672645. The cubic root of 23881631 is about 287.9749166362.

The spelling of 23881631 in words is "twenty-three million, eight hundred eighty-one thousand, six hundred thirty-one".