312813113221673 has 2 divisors, whose sum is σ = 312813113221674. Its totient is φ = 312813113221672.

The previous prime is 312813113221669. The next prime is 312813113221733. The reversal of 312813113221673 is 376122311318213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 312796965928489 + 16147293184 = 17686067^2 + 127072^2 .

It is a cyclic number.

It is not a de Polignac number, because 312813113221673 - 2² = 312813113221669 is a prime.

It is a super-2 number, since 2×312813113221673² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (312813113221663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156406556610836 + 156406556610837.

It is an arithmetic number, because the mean of its divisors is an integer number (156406556610837).

Almost surely, 2^{312813113221673} is an apocalyptic number.

It is an amenable number.

312813113221673 is a deficient number, since it is larger than the sum of its proper divisors (1).

312813113221673 is an equidigital number, since it uses as much as digits as its factorization.

312813113221673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 44.

Adding to 312813113221673 its reverse (376122311318213), we get a palindrome (688935424539886).

The spelling of 312813113221673 in words is "three hundred twelve trillion, eight hundred thirteen billion, one hundred thirteen million, two hundred twenty-one thousand, six hundred seventy-three".