312021313 has 2 divisors, whose sum is σ = 312021314. Its totient is φ = 312021312.

The previous prime is 312021301. The next prime is 312021337. The reversal of 312021313 is 313120213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 310041664 + 1979649 = 17608^2 + 1407^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312021313 is a prime.

It is not a weakly prime, because it can be changed into another prime (312021713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156010656 + 156010657.

It is an arithmetic number, because the mean of its divisors is an integer number (156010657).

Almost surely, 2^312021313 is an apocalyptic number.

It is an amenable number.

312021313 is a deficient number, since it is larger than the sum of its proper divisors (1).

312021313 is an equidigital number, since it uses as much as digits as its factorization.

312021313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 312021313 is about 17664.1250278637. The cubic root of 312021313 is about 678.2577320310.

Adding to 312021313 its reverse (313120213), we get a palindrome (625141526).

The spelling of 312021313 in words is "three hundred twelve million, twenty-one thousand, three hundred thirteen".