22143431231 has 16 divisors (see below), whose sum is σ = 23889296640. Its totient is φ = 20457178560.

The previous prime is 22143431221. The next prime is 22143431237. The reversal of 22143431231 is 13213434122.

It is a cyclic number.

It is not a de Polignac number, because 22143431231 - 2¹⁴ = 22143414847 is a prime.

It is a super-2 number, since 2×22143431231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22143431231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22143431237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 494051 + ... + 537003.

It is an arithmetic number, because the mean of its divisors is an integer number (1493081040).

Almost surely, 2^22143431231 is an apocalyptic number.

22143431231 is a deficient number, since it is larger than the sum of its proper divisors (1745865409).

22143431231 is a wasteful number, since it uses less digits than its factorization.

22143431231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43646.

The product of its digits is 3456, while the sum is 26.

Adding to 22143431231 its reverse (13213434122), we get a palindrome (35356865353).

The spelling of 22143431231 in words is "twenty-two billion, one hundred forty-three million, four hundred thirty-one thousand, two hundred thirty-one".