22831131 has 4 divisors (see below), whose sum is σ = 30441512. Its totient is φ = 15220752.

The previous prime is 22831129. The next prime is 22831139. The reversal of 22831131 is 13113822.

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

It is not a de Polignac number, because 22831131 - 2¹ = 22831129 is a prime.

It is a super-2 number, since 2×22831131² = 1042521085478322, 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 = 22831098 and 22831107.

It is not an unprimeable number, because it can be changed into a prime (22831139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3805186 + ... + 3805191.

It is an arithmetic number, because the mean of its divisors is an integer number (7610378).

Almost surely, 2^22831131 is an apocalyptic number.

22831131 is a deficient number, since it is larger than the sum of its proper divisors (7610381).

22831131 is an equidigital number, since it uses as much as digits as its factorization.

22831131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7610380.

The product of its digits is 288, while the sum is 21.

The square root of 22831131 is about 4778.1932777986. The cubic root of 22831131 is about 283.6889862151.

Adding to 22831131 its reverse (13113822), we get a palindrome (35944953).

The spelling of 22831131 in words is "twenty-two million, eight hundred thirty-one thousand, one hundred thirty-one".