311744692213 has 2 divisors, whose sum is σ = 311744692214. Its totient is φ = 311744692212.

The previous prime is 311744692199. The next prime is 311744692229. The reversal of 311744692213 is 312296447113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 214704343044 + 97040349169 = 463362^2 + 311513^2 .

It is a cyclic number.

It is not a de Polignac number, because 311744692213 - 2¹³ = 311744684021 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 311744692213.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311744692253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155872346106 + 155872346107.

It is an arithmetic number, because the mean of its divisors is an integer number (155872346107).

Almost surely, 2^311744692213 is an apocalyptic number.

It is an amenable number.

311744692213 is a deficient number, since it is larger than the sum of its proper divisors (1).

311744692213 is an equidigital number, since it uses as much as digits as its factorization.

311744692213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 43.

The spelling of 311744692213 in words is "three hundred eleven billion, seven hundred forty-four million, six hundred ninety-two thousand, two hundred thirteen".