25230241520 has 160 divisors (see below), whose sum is σ = 64821297600. Its totient is φ = 9056747520.

The previous prime is 25230241511. The next prime is 25230241583. The reversal of 25230241520 is 2514203252.

It is a self number, because there is not a number n which added to its sum of digits gives 25230241520.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25305662 + ... + 25306658.

It is an arithmetic number, because the mean of its divisors is an integer number (405133110).

Almost surely, 2^25230241520 is an apocalyptic number.

25230241520 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 25230241520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32410648800).

25230241520 is an abundant number, since it is smaller than the sum of its proper divisors (39591056080).

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

25230241520 is a wasteful number, since it uses less digits than its factorization.

25230241520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1363 (or 1357 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

Adding to 25230241520 its reverse (2514203252), we get a palindrome (27744444772).

The spelling of 25230241520 in words is "twenty-five billion, two hundred thirty million, two hundred forty-one thousand, five hundred twenty".