31252712417 has 2 divisors, whose sum is σ = 31252712418. Its totient is φ = 31252712416.

The previous prime is 31252712389. The next prime is 31252712423. The reversal of 31252712417 is 71421725213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28954085281 + 2298627136 = 170159^2 + 47944^2 .

It is a cyclic number.

It is not a de Polignac number, because 31252712417 - 2⁶ = 31252712353 is a prime.

It is not a weakly prime, because it can be changed into another prime (31252712717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15626356208 + 15626356209.

It is an arithmetic number, because the mean of its divisors is an integer number (15626356209).

Almost surely, 2^31252712417 is an apocalyptic number.

It is an amenable number.

31252712417 is a deficient number, since it is larger than the sum of its proper divisors (1).

31252712417 is an equidigital number, since it uses as much as digits as its factorization.

31252712417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23520, while the sum is 35.

The spelling of 31252712417 in words is "thirty-one billion, two hundred fifty-two million, seven hundred twelve thousand, four hundred seventeen".