311112157 has 2 divisors, whose sum is σ = 311112158. Its totient is φ = 311112156.

The previous prime is 311112143. The next prime is 311112229. The reversal of 311112157 is 751211113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 309021241 + 2090916 = 17579^2 + 1446^2 .

It is a cyclic number.

It is not a de Polignac number, because 311112157 - 2²⁷ = 176894429 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311112127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155556078 + 155556079.

It is an arithmetic number, because the mean of its divisors is an integer number (155556079).

Almost surely, 2^311112157 is an apocalyptic number.

It is an amenable number.

311112157 is a deficient number, since it is larger than the sum of its proper divisors (1).

311112157 is an equidigital number, since it uses as much as digits as its factorization.

311112157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 210, while the sum is 22.

The square root of 311112157 is about 17638.3717219022. The cubic root of 311112157 is about 677.5983305217.

The spelling of 311112157 in words is "three hundred eleven million, one hundred twelve thousand, one hundred fifty-seven".