311311313323343 has 2 divisors, whose sum is σ = 311311313323344. Its totient is φ = 311311313323342.

The previous prime is 311311313323331. The next prime is 311311313323349. The reversal of 311311313323343 is 343323313113113.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 311311313323343 - 2¹⁰ = 311311313322319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311311313323349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155655656661671 + 155655656661672.

It is an arithmetic number, because the mean of its divisors is an integer number (155655656661672).

Almost surely, 2^{311311313323343} is an apocalyptic number.

311311313323343 is a deficient number, since it is larger than the sum of its proper divisors (1).

311311313323343 is an equidigital number, since it uses as much as digits as its factorization.

311311313323343 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52488, while the sum is 35.

Adding to 311311313323343 its reverse (343323313113113), we get a palindrome (654634626436456).

The spelling of 311311313323343 in words is "three hundred eleven trillion, three hundred eleven billion, three hundred thirteen million, three hundred twenty-three thousand, three hundred forty-three".