311222302231 has 2 divisors, whose sum is σ = 311222302232. Its totient is φ = 311222302230.

The previous prime is 311222302213. The next prime is 311222302309. The reversal of 311222302231 is 132203222113.

Together with previous prime (311222302213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 311222302231 - 2²⁵ = 311188747799 is a prime.

It is a super-2 number, since 2×311222302231² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311222312231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155611151115 + 155611151116.

It is an arithmetic number, because the mean of its divisors is an integer number (155611151116).

Almost surely, 2^311222302231 is an apocalyptic number.

311222302231 is a deficient number, since it is larger than the sum of its proper divisors (1).

311222302231 is an equidigital number, since it uses as much as digits as its factorization.

311222302231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 311222302231 its reverse (132203222113), we get a palindrome (443425524344).

The spelling of 311222302231 in words is "three hundred eleven billion, two hundred twenty-two million, three hundred two thousand, two hundred thirty-one".