131931325 has 6 divisors (see below), whose sum is σ = 163594874. Its totient is φ = 105545040.

The previous prime is 131931287. The next prime is 131931329. The reversal of 131931325 is 523139131.

It can be written as a sum of positive squares in 3 ways, for example, as 6446521 + 125484804 = 2539^2 + 11202^2 .

It is not a de Polignac number, because 131931325 - 2¹¹ = 131929277 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131931293 and 131931302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131931329) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2638602 + ... + 2638651.

Almost surely, 2^131931325 is an apocalyptic number.

It is an amenable number.

131931325 is a deficient number, since it is larger than the sum of its proper divisors (31663549).

131931325 is an equidigital number, since it uses as much as digits as its factorization.

131931325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5277263 (or 5277258 counting only the distinct ones).

The product of its digits is 2430, while the sum is 28.

The square root of 131931325 is about 11486.1362084907. The cubic root of 131931325 is about 509.0760214947.

The spelling of 131931325 in words is "one hundred thirty-one million, nine hundred thirty-one thousand, three hundred twenty-five".