31013137 has 2 divisors, whose sum is σ = 31013138. Its totient is φ = 31013136.

The previous prime is 31013089. The next prime is 31013153. The reversal of 31013137 is 73131013.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29582721 + 1430416 = 5439^2 + 1196^2 .

It is a cyclic number.

It is not a de Polignac number, because 31013137 - 2¹¹ = 31011089 is a prime.

It is not a weakly prime, because it can be changed into another prime (31013167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15506568 + 15506569.

It is an arithmetic number, because the mean of its divisors is an integer number (15506569).

Almost surely, 2^31013137 is an apocalyptic number.

It is an amenable number.

31013137 is a deficient number, since it is larger than the sum of its proper divisors (1).

31013137 is an equidigital number, since it uses as much as digits as its factorization.

31013137 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 19.

The square root of 31013137 is about 5568.9439752973. The cubic root of 31013137 is about 314.1824335074.

The spelling of 31013137 in words is "thirty-one million, thirteen thousand, one hundred thirty-seven".