311242343 has 2 divisors, whose sum is σ = 311242344. Its totient is φ = 311242342.

The previous prime is 311242333. The next prime is 311242361. The reversal of 311242343 is 343242113.

It is a weak prime.

It is an emirp because it is prime and its reverse (343242113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 311242343 - 2¹⁰ = 311241319 is a prime.

It is a super-2 number, since 2×311242343² = 193743592152259298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311242303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155621171 + 155621172.

It is an arithmetic number, because the mean of its divisors is an integer number (155621172).

Almost surely, 2^311242343 is an apocalyptic number.

311242343 is a deficient number, since it is larger than the sum of its proper divisors (1).

311242343 is an equidigital number, since it uses as much as digits as its factorization.

311242343 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 23.

The square root of 311242343 is about 17642.0617559286. The cubic root of 311242343 is about 677.6928318268.

Adding to 311242343 its reverse (343242113), we get a palindrome (654484456).

The spelling of 311242343 in words is "three hundred eleven million, two hundred forty-two thousand, three hundred forty-three".