22456521025 has 81 divisors (see below), whose sum is σ = 31041018363. Its totient is φ = 16112409600.

The previous prime is 22456521023. The next prime is 22456521067. The reversal of 22456521025 is 52012565422.

The square root of 22456521025 is 149855.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 13 ways, for example, as 19446023601 + 3010497424 = 139449^2 + 54868^2 .

It is not a de Polignac number, because 22456521025 - 2¹ = 22456521023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22456521023) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 522244654 + ... + 522244696.

Almost surely, 2^22456521025 is an apocalyptic number.

22456521025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

22456521025 is the 149855-th square number.

22456521025 is the 74928-th centered octagonal number.

It is an amenable number.

22456521025 is a deficient number, since it is larger than the sum of its proper divisors (8584497338).

22456521025 is an equidigital number, since it uses as much as digits as its factorization.

22456521025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212 (or 106 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 34.

The spelling of 22456521025 in words is "twenty-two billion, four hundred fifty-six million, five hundred twenty-one thousand, twenty-five".