23188231 has 16 divisors (see below), whose sum is σ = 26085888. Its totient is φ = 20433600.

The previous prime is 23188229. The next prime is 23188237. The reversal of 23188231 is 13288132.

It is not a de Polignac number, because 23188231 - 2¹ = 23188229 is a prime.

It is a super-2 number, since 2×23188231² = 1075388113818722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23188231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23188237) 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, 53586 + ... + 54016.

It is an arithmetic number, because the mean of its divisors is an integer number (1630368).

Almost surely, 2^23188231 is an apocalyptic number.

23188231 is a deficient number, since it is larger than the sum of its proper divisors (2897657).

23188231 is a wasteful number, since it uses less digits than its factorization.

23188231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582.

The product of its digits is 2304, while the sum is 28.

The square root of 23188231 is about 4815.4159737244. The cubic root of 23188231 is about 285.1603939672.

Subtracting from 23188231 its reverse (13288132), we obtain a palindrome (9900099).

The spelling of 23188231 in words is "twenty-three million, one hundred eighty-eight thousand, two hundred thirty-one".