311131440343 has 2 divisors, whose sum is σ = 311131440344. Its totient is φ = 311131440342.

The previous prime is 311131440341. The next prime is 311131440359. The reversal of 311131440343 is 343044131113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 311131440343 - 2¹ = 311131440341 is a prime.

Together with 311131440341, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311131440341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155565720171 + 155565720172.

It is an arithmetic number, because the mean of its divisors is an integer number (155565720172).

Almost surely, 2^311131440343 is an apocalyptic number.

311131440343 is a deficient number, since it is larger than the sum of its proper divisors (1).

311131440343 is an equidigital number, since it uses as much as digits as its factorization.

311131440343 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 311131440343 its reverse (343044131113), we get a palindrome (654175571456).

The spelling of 311131440343 in words is "three hundred eleven billion, one hundred thirty-one million, four hundred forty thousand, three hundred forty-three".