23185131 has 16 divisors (see below), whose sum is σ = 31842720. Its totient is φ = 14996480.

The previous prime is 23185109. The next prime is 23185133. The reversal of 23185131 is 13158132.

It is a cyclic number.

It is not a de Polignac number, because 23185131 - 2⁷ = 23185003 is a prime.

It is a super-2 number, since 2×23185131² = 1075100598974322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23185133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28255 + ... + 29063.

It is an arithmetic number, because the mean of its divisors is an integer number (1990170).

Almost surely, 2^23185131 is an apocalyptic number.

23185131 is a deficient number, since it is larger than the sum of its proper divisors (8657589).

23185131 is a wasteful number, since it uses less digits than its factorization.

23185131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086.

The product of its digits is 720, while the sum is 24.

The square root of 23185131 is about 4815.0940800778. The cubic root of 23185131 is about 285.1476858450.

The spelling of 23185131 in words is "twenty-three million, one hundred eighty-five thousand, one hundred thirty-one".