25131522000 has 640 divisors, whose sum is σ = 91514142720. Its totient is φ = 5893171200.

The previous prime is 25131521999. The next prime is 25131522007. The reversal of 25131522000 is 22513152.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25131522007) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 197885937 + ... + 197886063.

It is an arithmetic number, because the mean of its divisors is an integer number (142990848).

Almost surely, 2^25131522000 is an apocalyptic number.

25131522000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25131522000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45757071360).

25131522000 is an abundant number, since it is smaller than the sum of its proper divisors (66382620720).

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

25131522000 is a wasteful number, since it uses less digits than its factorization.

25131522000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268 (or 252 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

It can be divided in two parts, 2513152 and 2000, that added together give a palindrome (2515152).

The spelling of 25131522000 in words is "twenty-five billion, one hundred thirty-one million, five hundred twenty-two thousand".