22565771225 has 12 divisors (see below), whose sum is σ = 28003507884. Its totient is φ = 18038454720.

The previous prime is 22565771191. The next prime is 22565771243. The reversal of 22565771225 is 52217756522.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 1563095296 + 21002675929 = 39536^2 + 144923^2 .

It is not a de Polignac number, because 22565771225 - 2²⁴ = 22548994009 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 321494 + ... + 385343.

It is an arithmetic number, because the mean of its divisors is an integer number (2333625657).

Almost surely, 2^22565771225 is an apocalyptic number.

22565771225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22565771225 is a deficient number, since it is larger than the sum of its proper divisors (5437736659).

22565771225 is a wasteful number, since it uses less digits than its factorization.

22565771225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708124 (or 708119 counting only the distinct ones).

The product of its digits is 588000, while the sum is 44.

The spelling of 22565771225 in words is "twenty-two billion, five hundred sixty-five million, seven hundred seventy-one thousand, two hundred twenty-five".