312015313 has 2 divisors, whose sum is σ = 312015314. Its totient is φ = 312015312.

The previous prime is 312015307. The next prime is 312015323. The reversal of 312015313 is 313510213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 305830144 + 6185169 = 17488^2 + 2487^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312015313 is a prime.

It is not a weakly prime, because it can be changed into another prime (312015323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156007656 + 156007657.

It is an arithmetic number, because the mean of its divisors is an integer number (156007657).

Almost surely, 2^312015313 is an apocalyptic number.

It is an amenable number.

312015313 is a deficient number, since it is larger than the sum of its proper divisors (1).

312015313 is an equidigital number, since it uses as much as digits as its factorization.

312015313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 270, while the sum is 19.

The square root of 312015313 is about 17663.9551912928. The cubic root of 312015313 is about 678.2533844941.

Adding to 312015313 its reverse (313510213), we get a palindrome (625525526).

The spelling of 312015313 in words is "three hundred twelve million, fifteen thousand, three hundred thirteen".