22531251144 has 32 divisors (see below), whose sum is σ = 56495293920. Its totient is φ = 7488128256.

The previous prime is 22531251079. The next prime is 22531251157. The reversal of 22531251144 is 44115213522.

It is a super-2 number, since 2×22531251144² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1384794 + ... + 1400969.

It is an arithmetic number, because the mean of its divisors is an integer number (1765477935).

Almost surely, 2^22531251144 is an apocalyptic number.

22531251144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

22531251144 is an abundant number, since it is smaller than the sum of its proper divisors (33964042776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22531251144 is a wasteful number, since it uses less digits than its factorization.

22531251144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2786109 (or 2786105 counting only the distinct ones).

The product of its digits is 9600, while the sum is 30.

Adding to 22531251144 its reverse (44115213522), we get a palindrome (66646464666).

The spelling of 22531251144 in words is "twenty-two billion, five hundred thirty-one million, two hundred fifty-one thousand, one hundred forty-four".