22215911872 has 112 divisors (see below), whose sum is σ = 56132748288. Its totient is φ = 8471301120.

The previous prime is 22215911849. The next prime is 22215911873. The reversal of 22215911872 is 27811951222.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22215911873) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 183658 + ... + 279574.

Almost surely, 2^22215911872 is an apocalyptic number.

22215911872 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22215911872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28066374144).

22215911872 is an abundant number, since it is smaller than the sum of its proper divisors (33916836416).

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

22215911872 is a wasteful number, since it uses less digits than its factorization.

22215911872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95994 (or 95984 counting only the distinct ones).

The product of its digits is 40320, while the sum is 40.

The spelling of 22215911872 in words is "twenty-two billion, two hundred fifteen million, nine hundred eleven thousand, eight hundred seventy-two".