311213230331 has 2 divisors, whose sum is σ = 311213230332. Its totient is φ = 311213230330.

The previous prime is 311213230309. The next prime is 311213230337. The reversal of 311213230331 is 133032312113.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 311213230331 - 2¹⁴ = 311213213947 is a prime.

It is a super-2 number, since 2×311213230331² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 311213230297 and 311213230306.

It is not a weakly prime, because it can be changed into another prime (311213230337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155606615165 + 155606615166.

It is an arithmetic number, because the mean of its divisors is an integer number (155606615166).

Almost surely, 2^311213230331 is an apocalyptic number.

311213230331 is a deficient number, since it is larger than the sum of its proper divisors (1).

311213230331 is an equidigital number, since it uses as much as digits as its factorization.

311213230331 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 311213230331 its reverse (133032312113), we get a palindrome (444245542444).

The spelling of 311213230331 in words is "three hundred eleven billion, two hundred thirteen million, two hundred thirty thousand, three hundred thirty-one".