23172131 has 8 divisors (see below), whose sum is σ = 24366000. Its totient is φ = 22004640.

The previous prime is 23172113. The next prime is 23172133. The reversal of 23172131 is 13127132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23172131 - 2⁶ = 23172067 is a prime.

It is a super-2 number, since 2×23172131² = 1073895310162322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23172133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4781 + ... + 8318.

It is an arithmetic number, because the mean of its divisors is an integer number (3045750).

Almost surely, 2^23172131 is an apocalyptic number.

23172131 is a deficient number, since it is larger than the sum of its proper divisors (1193869).

23172131 is a wasteful number, since it uses less digits than its factorization.

23172131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13189.

The product of its digits is 252, while the sum is 20.

The square root of 23172131 is about 4813.7439690952. The cubic root of 23172131 is about 285.0943813807.

Adding to 23172131 its reverse (13127132), we get a palindrome (36299263).

The spelling of 23172131 in words is "twenty-three million, one hundred seventy-two thousand, one hundred thirty-one".