311112143 has 2 divisors, whose sum is σ = 311112144. Its totient is φ = 311112142.

The previous prime is 311112127. The next prime is 311112157. The reversal of 311112143 is 341211113.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 311112143 - 2⁴ = 311112127 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311112343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155556071 + 155556072.

It is an arithmetic number, because the mean of its divisors is an integer number (155556072).

Almost surely, 2^311112143 is an apocalyptic number.

311112143 is a deficient number, since it is larger than the sum of its proper divisors (1).

311112143 is an equidigital number, since it uses as much as digits as its factorization.

311112143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72, while the sum is 17.

The square root of 311112143 is about 17638.3713250402. The cubic root of 311112143 is about 677.5983203577.

Adding to 311112143 its reverse (341211113), we get a palindrome (652323256).

The spelling of 311112143 in words is "three hundred eleven million, one hundred twelve thousand, one hundred forty-three".