311523320113 has 2 divisors, whose sum is σ = 311523320114. Its totient is φ = 311523320112.

The previous prime is 311523320089. The next prime is 311523320153. The reversal of 311523320113 is 311023325113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 311461099569 + 62220544 = 558087^2 + 7888^2 .

It is a cyclic number.

It is not a de Polignac number, because 311523320113 - 2⁵ = 311523320081 is a prime.

It is not a weakly prime, because it can be changed into another prime (311523320153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155761660056 + 155761660057.

It is an arithmetic number, because the mean of its divisors is an integer number (155761660057).

Almost surely, 2^311523320113 is an apocalyptic number.

It is an amenable number.

311523320113 is a deficient number, since it is larger than the sum of its proper divisors (1).

311523320113 is an equidigital number, since it uses as much as digits as its factorization.

311523320113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 25.

Adding to 311523320113 its reverse (311023325113), we get a palindrome (622546645226).

The spelling of 311523320113 in words is "three hundred eleven billion, five hundred twenty-three million, three hundred twenty thousand, one hundred thirteen".