312331211 has 2 divisors, whose sum is σ = 312331212. Its totient is φ = 312331210.

The previous prime is 312331207. The next prime is 312331213. The reversal of 312331211 is 112133213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 312331211 - 2² = 312331207 is a prime.

Together with 312331213, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 312331211.

It is not a weakly prime, because it can be changed into another prime (312331213) 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, 156165605 + 156165606.

It is an arithmetic number, because the mean of its divisors is an integer number (156165606).

Almost surely, 2^312331211 is an apocalyptic number.

312331211 is a deficient number, since it is larger than the sum of its proper divisors (1).

312331211 is an equidigital number, since it uses as much as digits as its factorization.

312331211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108, while the sum is 17.

The square root of 312331211 is about 17672.8948109810. The cubic root of 312331211 is about 678.4822051225.

Adding to 312331211 its reverse (112133213), we get a palindrome (424464424).

The spelling of 312331211 in words is "three hundred twelve million, three hundred thirty-one thousand, two hundred eleven".