311412287 has 2 divisors, whose sum is σ = 311412288. Its totient is φ = 311412286.

The previous prime is 311412263. The next prime is 311412317. The reversal of 311412287 is 782214113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 311412287 - 2¹⁸ = 311150143 is a prime.

It is a super-2 number, since 2×311412287² = 193955224989140738, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311412217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155706143 + 155706144.

It is an arithmetic number, because the mean of its divisors is an integer number (155706144).

Almost surely, 2^311412287 is an apocalyptic number.

311412287 is a deficient number, since it is larger than the sum of its proper divisors (1).

311412287 is an equidigital number, since it uses as much as digits as its factorization.

311412287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2688, while the sum is 29.

The square root of 311412287 is about 17646.8775425003. The cubic root of 311412287 is about 677.8161536026.

The spelling of 311412287 in words is "three hundred eleven million, four hundred twelve thousand, two hundred eighty-seven".