311320233131 has 2 divisors, whose sum is σ = 311320233132. Its totient is φ = 311320233130.

The previous prime is 311320233127. The next prime is 311320233167. The reversal of 311320233131 is 131332023113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 311320233131 - 2² = 311320233127 is a prime.

It is a super-2 number, since 2×311320233131² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 311320233097 and 311320233106.

It is not a weakly prime, because it can be changed into another prime (311320233121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155660116565 + 155660116566.

It is an arithmetic number, because the mean of its divisors is an integer number (155660116566).

Almost surely, 2^311320233131 is an apocalyptic number.

311320233131 is a deficient number, since it is larger than the sum of its proper divisors (1).

311320233131 is an equidigital number, since it uses as much as digits as its factorization.

311320233131 is an odious number, because the sum of its binary digits is odd.

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

Adding to 311320233131 its reverse (131332023113), we get a palindrome (442652256244).

The spelling of 311320233131 in words is "three hundred eleven billion, three hundred twenty million, two hundred thirty-three thousand, one hundred thirty-one".