23186131 has 4 divisors (see below), whose sum is σ = 23391432. Its totient is φ = 22980832.

The previous prime is 23186129. The next prime is 23186143. The reversal of 23186131 is 13168132.

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

It is a cyclic number.

It is not a de Polignac number, because 23186131 - 2¹ = 23186129 is a prime.

It is a super-2 number, since 2×23186131² = 1075193341498322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23186096 and 23186105.

It is not an unprimeable number, because it can be changed into a prime (23186431) 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, 102481 + ... + 102706.

It is an arithmetic number, because the mean of its divisors is an integer number (5847858).

Almost surely, 2^23186131 is an apocalyptic number.

23186131 is a deficient number, since it is larger than the sum of its proper divisors (205301).

23186131 is a wasteful number, since it uses less digits than its factorization.

23186131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205300.

The product of its digits is 864, while the sum is 25.

The square root of 23186131 is about 4815.1979190891. The cubic root of 23186131 is about 285.1517853630.

The spelling of 23186131 in words is "twenty-three million, one hundred eighty-six thousand, one hundred thirty-one".