311023531140331 has 2 divisors, whose sum is σ = 311023531140332. Its totient is φ = 311023531140330.

The previous prime is 311023531140317. The next prime is 311023531140337. The reversal of 311023531140331 is 133041135320113.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311023531140331 is a prime.

It is a super-2 number, since 2×311023531140331² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 311023531140293 and 311023531140302.

It is not a weakly prime, because it can be changed into another prime (311023531140337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155511765570165 + 155511765570166.

It is an arithmetic number, because the mean of its divisors is an integer number (155511765570166).

Almost surely, 2^{311023531140331} is an apocalyptic number.

311023531140331 is a deficient number, since it is larger than the sum of its proper divisors (1).

311023531140331 is an equidigital number, since it uses as much as digits as its factorization.

311023531140331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 31.

Adding to 311023531140331 its reverse (133041135320113), we get a palindrome (444064666460444).

The spelling of 311023531140331 in words is "three hundred eleven trillion, twenty-three billion, five hundred thirty-one million, one hundred forty thousand, three hundred thirty-one".