312508247 has 2 divisors, whose sum is σ = 312508248. Its totient is φ = 312508246.

The previous prime is 312508237. The next prime is 312508267. The reversal of 312508247 is 742805213.

It is a weak prime.

It is an emirp because it is prime and its reverse (742805213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312508247 - 2¹⁴ = 312491863 is a prime.

It is a super-2 number, since 2×312508247² = 195322808886026018, 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 (312508237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156254123 + 156254124.

It is an arithmetic number, because the mean of its divisors is an integer number (156254124).

Almost surely, 2^312508247 is an apocalyptic number.

312508247 is a deficient number, since it is larger than the sum of its proper divisors (1).

312508247 is an equidigital number, since it uses as much as digits as its factorization.

312508247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 312508247 is about 17677.9027885097. The cubic root of 312508247 is about 678.6103736434.

The spelling of 312508247 in words is "three hundred twelve million, five hundred eight thousand, two hundred forty-seven".