131515325 has 6 divisors (see below), whose sum is σ = 163079034. Its totient is φ = 105212240.

The previous prime is 131515309. The next prime is 131515327. The reversal of 131515325 is 523515131.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 13271449 + 118243876 = 3643^2 + 10874^2 .

It is not a de Polignac number, because 131515325 - 2⁴ = 131515309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131515294 and 131515303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131515327) 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, 2630282 + ... + 2630331.

It is an arithmetic number, because the mean of its divisors is an integer number (27179839).

Almost surely, 2^131515325 is an apocalyptic number.

It is an amenable number.

131515325 is a deficient number, since it is larger than the sum of its proper divisors (31563709).

131515325 is an equidigital number, since it uses as much as digits as its factorization.

131515325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5260623 (or 5260618 counting only the distinct ones).

The product of its digits is 2250, while the sum is 26.

The square root of 131515325 is about 11468.0131234665. The cubic root of 131515325 is about 508.5403928186.

The spelling of 131515325 in words is "one hundred thirty-one million, five hundred fifteen thousand, three hundred twenty-five".