22013131231 has 8 divisors (see below), whose sum is σ = 27093084704. Its totient is φ = 17416982880.

The previous prime is 22013131213. The next prime is 22013131253. The reversal of 22013131231 is 13213131022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22013131231 - 2⁹ = 22013130719 is a prime.

It is a super-2 number, since 2×22013131231² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22013131199 and 22013131208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22013131271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120951180 + ... + 120951361.

It is an arithmetic number, because the mean of its divisors is an integer number (3386635588).

Almost surely, 2^22013131231 is an apocalyptic number.

22013131231 is a deficient number, since it is larger than the sum of its proper divisors (5079953473).

22013131231 is a wasteful number, since it uses less digits than its factorization.

22013131231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241902561.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 22013131231 its reverse (13213131022), we get a palindrome (35226262253).

The spelling of 22013131231 in words is "twenty-two billion, thirteen million, one hundred thirty-one thousand, two hundred thirty-one".