22131252444 has 96 divisors (see below), whose sum is σ = 61825075200. Its totient is φ = 6027840000.

The previous prime is 22131252433. The next prime is 22131252449. The reversal of 22131252444 is 44425213122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22131252449) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 134944 + ... + 249944.

It is an arithmetic number, because the mean of its divisors is an integer number (644011200).

Almost surely, 2^22131252444 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22131252444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30912537600).

22131252444 is an abundant number, since it is smaller than the sum of its proper divisors (39693822756).

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

22131252444 is a wasteful number, since it uses less digits than its factorization.

22131252444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115123 (or 115121 counting only the distinct ones).

The product of its digits is 15360, while the sum is 30.

Adding to 22131252444 its reverse (44425213122), we get a palindrome (66556465566).

The spelling of 22131252444 in words is "twenty-two billion, one hundred thirty-one million, two hundred fifty-two thousand, four hundred forty-four".