25131210500125 has 8 divisors (see below), whose sum is σ = 31363750704312. Its totient is φ = 20104968400000.

The previous prime is 25131210500057. The next prime is 25131210500129. The reversal of 25131210500125 is 52100501213152.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5017537280196 + 20113673219929 = 2239986^2 + 4484827^2 .

It is not a de Polignac number, because 25131210500125 - 2²⁹ = 25130673629213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25131210500093 and 25131210500102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25131210500129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100524841876 + ... + 100524842125.

It is an arithmetic number, because the mean of its divisors is an integer number (3920468838039).

Almost surely, 2^{25131210500125} is an apocalyptic number.

25131210500125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25131210500125 is a deficient number, since it is larger than the sum of its proper divisors (6232540204187).

25131210500125 is an equidigital number, since it uses as much as digits as its factorization.

25131210500125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201049684016 (or 201049684006 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 28.

Adding to 25131210500125 its reverse (52100501213152), we get a palindrome (77231711713277).

The spelling of 25131210500125 in words is "twenty-five trillion, one hundred thirty-one billion, two hundred ten million, five hundred thousand, one hundred twenty-five".