131031137 has 2 divisors, whose sum is σ = 131031138. Its totient is φ = 131031136.

The previous prime is 131031133. The next prime is 131031167. The reversal of 131031137 is 731130131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70829056 + 60202081 = 8416^2 + 7759^2 .

It is a cyclic number.

It is not a de Polignac number, because 131031137 - 2² = 131031133 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131031133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65515568 + 65515569.

It is an arithmetic number, because the mean of its divisors is an integer number (65515569).

Almost surely, 2^131031137 is an apocalyptic number.

It is an amenable number.

131031137 is a deficient number, since it is larger than the sum of its proper divisors (1).

131031137 is an equidigital number, since it uses as much as digits as its factorization.

131031137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 189, while the sum is 20.

The square root of 131031137 is about 11446.8832876028. The cubic root of 131031137 is about 507.9155430823.

Adding to 131031137 its reverse (731130131), we get a palindrome (862161268).

The spelling of 131031137 in words is "one hundred thirty-one million, thirty-one thousand, one hundred thirty-seven".