22165020522 has 64 divisors (see below), whose sum is σ = 51338526720. Its totient is φ = 7080534000.

The previous prime is 22165020511. The next prime is 22165020539. The reversal of 22165020522 is 22502056122.

22165020522 is a `hidden beast` number, since 2 + 2 + 1 + 650 + 2 + 0 + 5 + 2 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 108147 + ... + 236697.

It is an arithmetic number, because the mean of its divisors is an integer number (802164480).

Almost surely, 2^22165020522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22165020522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25669263360).

22165020522 is an abundant number, since it is smaller than the sum of its proper divisors (29173506198).

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

22165020522 is a wasteful number, since it uses less digits than its factorization.

22165020522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128696 (or 128690 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 22165020522 its reverse (22502056122), we get a palindrome (44667076644).

The spelling of 22165020522 in words is "twenty-two billion, one hundred sixty-five million, twenty thousand, five hundred twenty-two".