25220131504 has 20 divisors (see below), whose sum is σ = 49692210120. Its totient is φ = 12396335360.

The previous prime is 25220131493. The next prime is 25220131507. The reversal of 25220131504 is 40513102252.

It is not an unprimeable number, because it can be changed into a prime (25220131507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13357177 + ... + 13359064.

It is an arithmetic number, because the mean of its divisors is an integer number (2484610506).

Almost surely, 2^25220131504 is an apocalyptic number.

It is an amenable number.

25220131504 is a deficient number, since it is larger than the sum of its proper divisors (24472078616).

25220131504 is a wasteful number, since it uses less digits than its factorization.

25220131504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26716308 (or 26716302 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 25220131504 its reverse (40513102252), we get a palindrome (65733233756).

The spelling of 25220131504 in words is "twenty-five billion, two hundred twenty million, one hundred thirty-one thousand, five hundred four".