23508131 has 4 divisors (see below), whose sum is σ = 24008352. Its totient is φ = 23007912.

The previous prime is 23508113. The next prime is 23508151. The reversal of 23508131 is 13180532.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23508131 is a prime.

It is a super-2 number, since 2×23508131² = 1105264446226322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23508097 and 23508106.

It is not an unprimeable number, because it can be changed into a prime (23508101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250040 + ... + 250133.

It is an arithmetic number, because the mean of its divisors is an integer number (6002088).

Almost surely, 2^23508131 is an apocalyptic number.

23508131 is a deficient number, since it is larger than the sum of its proper divisors (500221).

23508131 is an equidigital number, since it uses as much as digits as its factorization.

23508131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500220.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 23508131 is about 4848.5184335011. The cubic root of 23508131 is about 286.4657472297.

Adding to 23508131 its reverse (13180532), we get a palindrome (36688663).

The spelling of 23508131 in words is "twenty-three million, five hundred eight thousand, one hundred thirty-one".