22540013221225 has 12 divisors (see below), whose sum is σ = 28476967648716. Its totient is φ = 17691783961280.

The previous prime is 22540013221147. The next prime is 22540013221247. The reversal of 22540013221225 is 52212231004522.

It can be written as a sum of positive squares in 6 ways, for example, as 1762288110144 + 20777725111081 = 1327512^2 + 4558259^2 .

It is not a de Polignac number, because 22540013221225 - 2²⁷ = 22539879003497 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, 8505664042 + ... + 8505666691.

It is an arithmetic number, because the mean of its divisors is an integer number (2373080637393).

Almost surely, 2^{22540013221225} is an apocalyptic number.

22540013221225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22540013221225 is a deficient number, since it is larger than the sum of its proper divisors (5936954427491).

22540013221225 is a wasteful number, since it uses less digits than its factorization.

22540013221225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17011330796 (or 17011330791 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 22540013221225 its reverse (52212231004522), we get a palindrome (74752244225747).

The spelling of 22540013221225 in words is "twenty-two trillion, five hundred forty billion, thirteen million, two hundred twenty-one thousand, two hundred twenty-five".