31268137 has 2 divisors, whose sum is σ = 31268138. Its totient is φ = 31268136.

The previous prime is 31268099. The next prime is 31268141. The reversal of 31268137 is 73186213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16128256 + 15139881 = 4016^2 + 3891^2 .

It is a cyclic number.

It is not a de Polignac number, because 31268137 - 2¹⁹ = 30743849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31268099 and 31268108.

It is not a weakly prime, because it can be changed into another prime (31268147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15634068 + 15634069.

It is an arithmetic number, because the mean of its divisors is an integer number (15634069).

Almost surely, 2^31268137 is an apocalyptic number.

It is an amenable number.

31268137 is a deficient number, since it is larger than the sum of its proper divisors (1).

31268137 is an equidigital number, since it uses as much as digits as its factorization.

31268137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 31.

The square root of 31268137 is about 5591.7919310361. The cubic root of 31268137 is about 315.0411871902.

The spelling of 31268137 in words is "thirty-one million, two hundred sixty-eight thousand, one hundred thirty-seven".