25117495225 has 27 divisors (see below), whose sum is σ = 32286256743. Its totient is φ = 19383349440.

The previous prime is 25117495187. The next prime is 25117495243. The reversal of 25117495225 is 52259471152.

The square root of 25117495225 is 158485.

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 1402727209 + 23714768016 = 37453^2 + 153996^2 .

It is not a de Polignac number, because 25117495225 - 2⁷ = 25117495097 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 22979779 + ... + 22980871.

Almost surely, 2^25117495225 is an apocalyptic number.

25117495225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

25117495225 is the 158485-th square number.

25117495225 is the 79243-rd centered octagonal number.

It is an amenable number.

25117495225 is a deficient number, since it is larger than the sum of its proper divisors (7168761518).

25117495225 is an frugal number, since it uses more digits than its factorization.

25117495225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2254 (or 1127 counting only the distinct ones).

The product of its digits is 252000, while the sum is 43.

The spelling of 25117495225 in words is "twenty-five billion, one hundred seventeen million, four hundred ninety-five thousand, two hundred twenty-five".