312031207 has 2 divisors, whose sum is σ = 312031208. Its totient is φ = 312031206.

The previous prime is 312031183. The next prime is 312031211. The reversal of 312031207 is 702130213.

It is a strong prime.

It is an emirp because it is prime and its reverse (702130213) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312031207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312031217) 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, 156015603 + 156015604.

It is an arithmetic number, because the mean of its divisors is an integer number (156015604).

Almost surely, 2^312031207 is an apocalyptic number.

312031207 is a deficient number, since it is larger than the sum of its proper divisors (1).

312031207 is an equidigital number, since it uses as much as digits as its factorization.

312031207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 312031207 is about 17664.4050848026. The cubic root of 312031207 is about 678.2649009975.

The spelling of 312031207 in words is "three hundred twelve million, thirty-one thousand, two hundred seven".