22231131231 has 4 divisors (see below), whose sum is σ = 29641508312. Its totient is φ = 14820754152.

The previous prime is 22231131191. The next prime is 22231131269. The reversal of 22231131231 is 13213113222.

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

It is not a de Polignac number, because 22231131231 - 2²⁵ = 22197576799 is a prime.

It is a super-2 number, since 2×22231131231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22231131198 and 22231131207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22231131731) 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, 3705188536 + ... + 3705188541.

It is an arithmetic number, because the mean of its divisors is an integer number (7410377078).

Almost surely, 2^22231131231 is an apocalyptic number.

22231131231 is a deficient number, since it is larger than the sum of its proper divisors (7410377081).

22231131231 is an equidigital number, since it uses as much as digits as its factorization.

22231131231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7410377080.

The product of its digits is 432, while the sum is 21.

Adding to 22231131231 its reverse (13213113222), we get a palindrome (35444244453).

The spelling of 22231131231 in words is "twenty-two billion, two hundred thirty-one million, one hundred thirty-one thousand, two hundred thirty-one".