311223003351331 has 2 divisors, whose sum is σ = 311223003351332. Its totient is φ = 311223003351330.

The previous prime is 311223003351317. The next prime is 311223003351353. The reversal of 311223003351331 is 133153300322113.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 311223003351331 - 2³¹ = 311220855867683 is a prime.

It is a super-2 number, since 2×311223003351331² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 311223003351293 and 311223003351302.

It is not a weakly prime, because it can be changed into another prime (311223003355331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155611501675665 + 155611501675666.

It is an arithmetic number, because the mean of its divisors is an integer number (155611501675666).

Almost surely, 2^{311223003351331} is an apocalyptic number.

311223003351331 is a deficient number, since it is larger than the sum of its proper divisors (1).

311223003351331 is an equidigital number, since it uses as much as digits as its factorization.

311223003351331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14580, while the sum is 31.

Adding to 311223003351331 its reverse (133153300322113), we get a palindrome (444376303673444).

The spelling of 311223003351331 in words is "three hundred eleven trillion, two hundred twenty-three billion, three million, three hundred fifty-one thousand, three hundred thirty-one".