25131732 has 72 divisors (see below), whose sum is σ = 63546336. Its totient is φ = 7723584.

The previous prime is 25131713. The next prime is 25131739. The reversal of 25131732 is 23713152.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25131739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 234823 + ... + 234929.

It is an arithmetic number, because the mean of its divisors is an integer number (882588).

Almost surely, 2^25131732 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 25131732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31773168).

25131732 is an abundant number, since it is smaller than the sum of its proper divisors (38414604).

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

25131732 is a wasteful number, since it uses less digits than its factorization.

25131732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197 (or 172 counting only the distinct ones).

The product of its digits is 1260, while the sum is 24.

The square root of 25131732 is about 5013.1558922499. The cubic root of 25131732 is about 292.9144566561.

Adding to 25131732 its reverse (23713152), we get a palindrome (48844884).

The spelling of 25131732 in words is "twenty-five million, one hundred thirty-one thousand, seven hundred thirty-two".