25531500125 has 8 divisors (see below), whose sum is σ = 31863312312. Its totient is φ = 20425200000.

The previous prime is 25531500107. The next prime is 25531500139. The reversal of 25531500125 is 52100513552.

It can be written as a sum of positive squares in 4 ways, for example, as 326127481 + 25205372644 = 18059^2 + 158762^2 .

It is not a de Polignac number, because 25531500125 - 2¹⁶ = 25531434589 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 102125876 + ... + 102126125.

It is an arithmetic number, because the mean of its divisors is an integer number (3982914039).

Almost surely, 2^25531500125 is an apocalyptic number.

25531500125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25531500125 is a deficient number, since it is larger than the sum of its proper divisors (6331812187).

25531500125 is an equidigital number, since it uses as much as digits as its factorization.

25531500125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204252016 (or 204252006 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 29.

The spelling of 25531500125 in words is "twenty-five billion, five hundred thirty-one million, five hundred thousand, one hundred twenty-five".