31252005137 has 2 divisors, whose sum is σ = 31252005138. Its totient is φ = 31252005136.

The previous prime is 31252005047. The next prime is 31252005151. The reversal of 31252005137 is 73150025213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23694137041 + 7557868096 = 153929^2 + 86936^2 .

It is a cyclic number.

It is not a de Polignac number, because 31252005137 - 2⁸ = 31252004881 is a prime.

It is not a weakly prime, because it can be changed into another prime (31252005167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15626002568 + 15626002569.

It is an arithmetic number, because the mean of its divisors is an integer number (15626002569).

Almost surely, 2^31252005137 is an apocalyptic number.

It is an amenable number.

31252005137 is a deficient number, since it is larger than the sum of its proper divisors (1).

31252005137 is an equidigital number, since it uses as much as digits as its factorization.

31252005137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6300, while the sum is 29.

The spelling of 31252005137 in words is "thirty-one billion, two hundred fifty-two million, five thousand, one hundred thirty-seven".