311310332321 has 2 divisors, whose sum is σ = 311310332322. Its totient is φ = 311310332320.

The previous prime is 311310332239. The next prime is 311310332329. The reversal of 311310332321 is 123233013113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 221780716096 + 89529616225 = 470936^2 + 299215^2 .

It is a cyclic number.

It is not a de Polignac number, because 311310332321 - 2³⁰ = 310236590497 is a prime.

It is a super-2 number, since 2×311310332321² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (311310332329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155655166160 + 155655166161.

It is an arithmetic number, because the mean of its divisors is an integer number (155655166161).

Almost surely, 2^311310332321 is an apocalyptic number.

It is an amenable number.

311310332321 is a deficient number, since it is larger than the sum of its proper divisors (1).

311310332321 is an equidigital number, since it uses as much as digits as its factorization.

311310332321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 311310332321 its reverse (123233013113), we get a palindrome (434543345434).

The spelling of 311310332321 in words is "three hundred eleven billion, three hundred ten million, three hundred thirty-two thousand, three hundred twenty-one".