311145343 has 2 divisors, whose sum is σ = 311145344. Its totient is φ = 311145342.

The previous prime is 311145299. The next prime is 311145353. The reversal of 311145343 is 343541113.

It is a strong prime.

It is an emirp because it is prime and its reverse (343541113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 311145343 - 2⁹ = 311144831 is a prime.

It is a super-2 number, since 2×311145343² = 193622848941175298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311145353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155572671 + 155572672.

It is an arithmetic number, because the mean of its divisors is an integer number (155572672).

Almost surely, 2^311145343 is an apocalyptic number.

311145343 is a deficient number, since it is larger than the sum of its proper divisors (1).

311145343 is an equidigital number, since it uses as much as digits as its factorization.

311145343 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 25.

The square root of 311145343 is about 17639.3124299106. The cubic root of 311145343 is about 677.6224225607.

Adding to 311145343 its reverse (343541113), we get a palindrome (654686456).

The spelling of 311145343 in words is "three hundred eleven million, one hundred forty-five thousand, three hundred forty-three".