311230247 has 2 divisors, whose sum is σ = 311230248. Its totient is φ = 311230246.

The previous prime is 311230159. The next prime is 311230289. The reversal of 311230247 is 742032113.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 311230247 - 2¹⁸ = 310968103 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 (311230147) 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, 155615123 + 155615124.

It is an arithmetic number, because the mean of its divisors is an integer number (155615124).

Almost surely, 2^311230247 is an apocalyptic number.

311230247 is a deficient number, since it is larger than the sum of its proper divisors (1).

311230247 is an equidigital number, since it uses as much as digits as its factorization.

311230247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 311230247 is about 17641.7189355233. The cubic root of 311230247 is about 677.6840525172.

The spelling of 311230247 in words is "three hundred eleven million, two hundred thirty thousand, two hundred forty-seven".