22221565216 has 24 divisors (see below), whose sum is σ = 46051271280. Its totient is φ = 10526004288.

The previous prime is 22221565211. The next prime is 22221565229. The reversal of 22221565216 is 61256512222.

It is a super-2 number, since 2×22221565216² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22221565211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18273706 + ... + 18274921.

It is an arithmetic number, because the mean of its divisors is an integer number (1918802970).

Almost surely, 2^22221565216 is an apocalyptic number.

It is an amenable number.

22221565216 is an abundant number, since it is smaller than the sum of its proper divisors (23829706064).

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

22221565216 is a wasteful number, since it uses less digits than its factorization.

22221565216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36548656 (or 36548648 counting only the distinct ones).

The product of its digits is 28800, while the sum is 34.

The spelling of 22221565216 in words is "twenty-two billion, two hundred twenty-one million, five hundred sixty-five thousand, two hundred sixteen".