25135252225 has 24 divisors (see below), whose sum is σ = 31530229952. Its totient is φ = 19875067200.

The previous prime is 25135252223. The next prime is 25135252229. The reversal of 25135252225 is 52225253152.

It is a happy number.

It is not a de Polignac number, because 25135252225 - 2¹ = 25135252223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25135252223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1384054 + ... + 1402096.

Almost surely, 2^25135252225 is an apocalyptic number.

25135252225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25135252225 is a deficient number, since it is larger than the sum of its proper divisors (6394977727).

25135252225 is a wasteful number, since it uses less digits than its factorization.

25135252225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18697 (or 18692 counting only the distinct ones).

The product of its digits is 60000, while the sum is 34.

The spelling of 25135252225 in words is "twenty-five billion, one hundred thirty-five million, two hundred fifty-two thousand, two hundred twenty-five".