25135251 has 16 divisors (see below), whose sum is σ = 35499264. Its totient is φ = 15786144.

The previous prime is 25135241. The next prime is 25135259. The reversal of 25135251 is 15253152.

It is a happy number.

It is not a de Polignac number, because 25135251 - 2²³ = 16746643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25135259) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1905 + ... + 7341.

It is an arithmetic number, because the mean of its divisors is an integer number (2218704).

Almost surely, 2^25135251 is an apocalyptic number.

25135251 is a deficient number, since it is larger than the sum of its proper divisors (10364013).

25135251 is a wasteful number, since it uses less digits than its factorization.

25135251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5530.

The product of its digits is 1500, while the sum is 24.

The square root of 25135251 is about 5013.5068564828. The cubic root of 25135251 is about 292.9281275253.

The spelling of 25135251 in words is "twenty-five million, one hundred thirty-five thousand, two hundred fifty-one".