17222625225 has 81 divisors (see below), whose sum is σ = 33452767647. Its totient is φ = 8466232320.

The previous prime is 17222625223. The next prime is 17222625293. The reversal of 17222625225 is 52252622271.

The square root of 17222625225 is 131235.

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

17222625225 is a `hidden beast` number, since 1 + 7 + 2 + 2 + 2 + 625 + 2 + 25 = 666.

It can be written as a sum of positive squares in 13 ways, for example, as 17121984201 + 100641024 = 130851^2 + 10032^2 .

It is not a de Polignac number, because 17222625225 - 2¹ = 17222625223 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 17222625225.

It is not an unprimeable number, because it can be changed into a prime (17222625223) 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, 25590489 + ... + 25591161.

Almost surely, 2^17222625225 is an apocalyptic number.

17222625225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

17222625225 is the 131235-th square number.

17222625225 is the 65618-th centered octagonal number.

It is an amenable number.

17222625225 is a deficient number, since it is larger than the sum of its proper divisors (16230142422).

17222625225 is an equidigital number, since it uses as much as digits as its factorization.

17222625225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1388 (or 694 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

Multiplying 17222625225 by its sum of digits (36), we get a square (620014508100 = 787410²).

The spelling of 17222625225 in words is "seventeen billion, two hundred twenty-two million, six hundred twenty-five thousand, two hundred twenty-five".