21985095222 has 32 divisors (see below), whose sum is σ = 49240473600. Its totient is φ = 7270659144.

The previous prime is 21985095221. The next prime is 21985095229. The reversal of 21985095222 is 22259058912.

It is a happy number.

21985095222 is a `hidden beast` number, since 2 + 1 + 98 + 509 + 52 + 2 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21985095221) 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, 1596022 + ... + 1609737.

It is an arithmetic number, because the mean of its divisors is an integer number (1538764800).

Almost surely, 2^21985095222 is an apocalyptic number.

21985095222 is an abundant number, since it is smaller than the sum of its proper divisors (27255378378).

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

21985095222 is a wasteful number, since it uses less digits than its factorization.

21985095222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3205897 (or 3205891 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The spelling of 21985095222 in words is "twenty-one billion, nine hundred eighty-five million, ninety-five thousand, two hundred twenty-two".