317212513 has 2 divisors, whose sum is σ = 317212514. Its totient is φ = 317212512.

The previous prime is 317212487. The next prime is 317212529. The reversal of 317212513 is 315212713.

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., 291487329 + 25725184 = 17073^2 + 5072^2 .

It is a cyclic number.

It is not a de Polignac number, because 317212513 - 2⁹ = 317212001 is a prime.

It is not a weakly prime, because it can be changed into another prime (317212913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158606256 + 158606257.

It is an arithmetic number, because the mean of its divisors is an integer number (158606257).

Almost surely, 2^317212513 is an apocalyptic number.

It is an amenable number.

317212513 is a deficient number, since it is larger than the sum of its proper divisors (1).

317212513 is an equidigital number, since it uses as much as digits as its factorization.

317212513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1260, while the sum is 25.

The square root of 317212513 is about 17810.4607744999. The cubic root of 317212513 is about 681.9985272713.

The spelling of 317212513 in words is "three hundred seventeen million, two hundred twelve thousand, five hundred thirteen".