23631 has 4 divisors (see below), whose sum is σ = 31512. Its totient is φ = 15752.

The previous prime is 23629. The next prime is 23633. The reversal of 23631 is 13632.

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

It is an interprime number because it is at equal distance from previous prime (23629) and next prime (23633).

It is a cyclic number.

It is not a de Polignac number, because 23631 - 2¹ = 23629 is a prime.

It is a super-2 number, since 2×23631² = 1116848322, which contains 22 as substring.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 23631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23633) 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, 3936 + ... + 3941.

It is an arithmetic number, because the mean of its divisors is an integer number (7878).

2²³⁶³¹ is an apocalyptic number.

23631 is a deficient number, since it is larger than the sum of its proper divisors (7881).

23631 is an equidigital number, since it uses as much as digits as its factorization.

23631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7880.

The product of its digits is 108, while the sum is 15.

The square root of 23631 is about 153.7237782518. The cubic root of 23631 is about 28.6963966549.

Subtracting from 23631 its reverse (13632), we obtain a palindrome (9999).

The spelling of 23631 in words is "twenty-three thousand, six hundred thirty-one".