22031232144 has 40 divisors (see below), whose sum is σ = 60261901920. Its totient is φ = 6911758848.

The previous prime is 22031232137. The next prime is 22031232193. The reversal of 22031232144 is 44123213022.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 13498714 + ... + 13500345.

It is an arithmetic number, because the mean of its divisors is an integer number (1506547548).

Almost surely, 2^22031232144 is an apocalyptic number.

22031232144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

22031232144 is an abundant number, since it is smaller than the sum of its proper divisors (38230669776).

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

22031232144 is a wasteful number, since it uses less digits than its factorization.

22031232144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26999087 (or 26999081 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 22031232144 its reverse (44123213022), we get a palindrome (66154445166).

The spelling of 22031232144 in words is "twenty-two billion, thirty-one million, two hundred thirty-two thousand, one hundred forty-four".