25131442432 has 72 divisors (see below), whose sum is σ = 50733077472. Its totient is φ = 12424089600.

The previous prime is 25131442379. The next prime is 25131442447. The reversal of 25131442432 is 23424413152.

It is a junction number, because it is equal to n+sod(n) for n = 25131442394 and 25131442403.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10294332 + ... + 10296772.

It is an arithmetic number, because the mean of its divisors is an integer number (704626076).

Almost surely, 2^25131442432 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 25131442432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25366538736).

25131442432 is an abundant number, since it is smaller than the sum of its proper divisors (25601635040).

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

25131442432 is a wasteful number, since it uses less digits than its factorization.

25131442432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2895 (or 2881 counting only the distinct ones).

The product of its digits is 23040, while the sum is 31.

Adding to 25131442432 its reverse (23424413152), we get a palindrome (48555855584).

The spelling of 25131442432 in words is "twenty-five billion, one hundred thirty-one million, four hundred forty-two thousand, four hundred thirty-two".