31331300137 has 2 divisors, whose sum is σ = 31331300138. Its totient is φ = 31331300136.

The previous prime is 31331300089. The next prime is 31331300149. The reversal of 31331300137 is 73100313313.

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., 18284177961 + 13047122176 = 135219^2 + 114224^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31331300137 is a prime.

It is not a weakly prime, because it can be changed into another prime (31331300537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15665650068 + 15665650069.

It is an arithmetic number, because the mean of its divisors is an integer number (15665650069).

Almost surely, 2^31331300137 is an apocalyptic number.

It is an amenable number.

31331300137 is a deficient number, since it is larger than the sum of its proper divisors (1).

31331300137 is an equidigital number, since it uses as much as digits as its factorization.

31331300137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1701, while the sum is 25.

The spelling of 31331300137 in words is "thirty-one billion, three hundred thirty-one million, three hundred thousand, one hundred thirty-seven".