25131512 has 48 divisors (see below), whose sum is σ = 55766520. Its totient is φ = 10584000.

The previous prime is 25131497. The next prime is 25131521. The reversal of 25131512 is 21513152.

It is a happy number.

It is a super-2 number, since 2×25131512² = 1263185790812288, which contains 22 as substring.

It is a congruent 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, 23387 + ... + 24437.

Almost surely, 2^25131512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25131512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27883260).

25131512 is an abundant number, since it is smaller than the sum of its proper divisors (30635008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25131512 is a wasteful number, since it uses less digits than its factorization.

25131512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1132 (or 1121 counting only the distinct ones).

The product of its digits is 300, while the sum is 20.

The square root of 25131512 is about 5013.1339499359. The cubic root of 25131512 is about 292.9136019415.

Adding to 25131512 its reverse (21513152), we get a palindrome (46644664).

The spelling of 25131512 in words is "twenty-five million, one hundred thirty-one thousand, five hundred twelve".