311301318908813 has 2 divisors, whose sum is σ = 311301318908814. Its totient is φ = 311301318908812.

The previous prime is 311301318908809. The next prime is 311301318908843. The reversal of 311301318908813 is 318809813103113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 179379600933289 + 131921717975524 = 13393267^2 + 11485718^2 .

It is a cyclic number.

It is not a de Polignac number, because 311301318908813 - 2² = 311301318908809 is a prime.

It is a super-2 number, since 2×311301318908813² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311301318908843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155650659454406 + 155650659454407.

It is an arithmetic number, because the mean of its divisors is an integer number (155650659454407).

Almost surely, 2^{311301318908813} is an apocalyptic number.

It is an amenable number.

311301318908813 is a deficient number, since it is larger than the sum of its proper divisors (1).

311301318908813 is an equidigital number, since it uses as much as digits as its factorization.

311301318908813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 373248, while the sum is 50.

The spelling of 311301318908813 in words is "three hundred eleven trillion, three hundred one billion, three hundred eighteen million, nine hundred eight thousand, eight hundred thirteen".