23151131 has 4 divisors (see below), whose sum is σ = 23261064. Its totient is φ = 23041200.

The previous prime is 23151109. The next prime is 23151181. The reversal of 23151131 is 13115132.

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

It is not a de Polignac number, because 23151131 - 2¹⁴ = 23134747 is a prime.

It is a super-2 number, since 2×23151131² = 1071949733158322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23151181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54650 + ... + 55071.

It is an arithmetic number, because the mean of its divisors is an integer number (5815266).

Almost surely, 2^23151131 is an apocalyptic number.

23151131 is a deficient number, since it is larger than the sum of its proper divisors (109933).

23151131 is a wasteful number, since it uses less digits than its factorization.

23151131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109932.

The product of its digits is 90, while the sum is 17.

The square root of 23151131 is about 4811.5622203189. The cubic root of 23151131 is about 285.0082320388.

Adding to 23151131 its reverse (13115132), we get a palindrome (36266263).

The spelling of 23151131 in words is "twenty-three million, one hundred fifty-one thousand, one hundred thirty-one".