22431022131 has 16 divisors (see below), whose sum is σ = 34613273600. Its totient is φ = 12655476288.

The previous prime is 22431022127. The next prime is 22431022169. The reversal of 22431022131 is 13122013422.

It is not a de Polignac number, because 22431022131 - 2² = 22431022127 is a prime.

It is a super-2 number, since 2×22431022131² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22431022098 and 22431022107.

It is not an unprimeable number, because it can be changed into a prime (22431022231) 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, 6758746 + ... + 6762063.

It is an arithmetic number, because the mean of its divisors is an integer number (2163329600).

Almost surely, 2^22431022131 is an apocalyptic number.

22431022131 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

22431022131 is a deficient number, since it is larger than the sum of its proper divisors (12182251469).

22431022131 is a wasteful number, since it uses less digits than its factorization.

22431022131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13520898.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 22431022131 its reverse (13122013422), we get a palindrome (35553035553).

The spelling of 22431022131 in words is "twenty-two billion, four hundred thirty-one million, twenty-two thousand, one hundred thirty-one".