22131332304444 has 288 divisors, whose sum is σ = 65346937935552. Its totient is φ = 6293158502400.

The previous prime is 22131332304439. The next prime is 22131332304503. The reversal of 22131332304444 is 44440323313122.

22131332304444 is a `hidden beast` number, since 2 + 2 + 1 + 313 + 32 + 304 + 4 + 4 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 22131332304399 and 22131332304408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 274470454 + ... + 274551074.

It is an arithmetic number, because the mean of its divisors is an integer number (226899090054).

Almost surely, 2^{22131332304444} 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 22131332304444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32673468967776).

22131332304444 is an abundant number, since it is smaller than the sum of its proper divisors (43215605631108).

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

22131332304444 is a wasteful number, since it uses less digits than its factorization.

22131332304444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81018 (or 80991 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 36.

Adding to 22131332304444 its reverse (44440323313122), we get a palindrome (66571655617566).

The spelling of 22131332304444 in words is "twenty-two trillion, one hundred thirty-one billion, three hundred thirty-two million, three hundred four thousand, four hundred forty-four".