22731251772 has 96 divisors (see below), whose sum is σ = 56439028800. Its totient is φ = 7107028992.

The previous prime is 22731251737. The next prime is 22731251783. The reversal of 22731251772 is 27715213722.

It is a self number, because there is not a number n which added to its sum of digits gives 22731251772.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13300054 + ... + 13301762.

It is an arithmetic number, because the mean of its divisors is an integer number (587906550).

Almost surely, 2^22731251772 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 22731251772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28219514400).

22731251772 is an abundant number, since it is smaller than the sum of its proper divisors (33707777028).

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

22731251772 is a wasteful number, since it uses less digits than its factorization.

22731251772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2815 (or 2813 counting only the distinct ones).

The product of its digits is 82320, while the sum is 39.

The spelling of 22731251772 in words is "twenty-two billion, seven hundred thirty-one million, two hundred fifty-one thousand, seven hundred seventy-two".