131512657 has 2 divisors, whose sum is σ = 131512658. Its totient is φ = 131512656.

The previous prime is 131512631. The next prime is 131512679. The reversal of 131512657 is 756215131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67256401 + 64256256 = 8201^2 + 8016^2 .

It is a cyclic number.

It is not a de Polignac number, because 131512657 - 2⁷ = 131512529 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131512607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65756328 + 65756329.

It is an arithmetic number, because the mean of its divisors is an integer number (65756329).

Almost surely, 2^131512657 is an apocalyptic number.

It is an amenable number.

131512657 is a deficient number, since it is larger than the sum of its proper divisors (1).

131512657 is an equidigital number, since it uses as much as digits as its factorization.

131512657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6300, while the sum is 31.

The square root of 131512657 is about 11467.8967993264. The cubic root of 131512657 is about 508.5369539419.

Adding to 131512657 its reverse (756215131), we get a palindrome (887727788).

The spelling of 131512657 in words is "one hundred thirty-one million, five hundred twelve thousand, six hundred fifty-seven".