313215317 has 2 divisors, whose sum is σ = 313215318. Its totient is φ = 313215316.

The previous prime is 313215307. The next prime is 313215349. The reversal of 313215317 is 713512313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 238115761 + 75099556 = 15431^2 + 8666^2 .

It is a cyclic number.

It is not a de Polignac number, because 313215317 - 2²⁶ = 246106453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313215307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156607658 + 156607659.

It is an arithmetic number, because the mean of its divisors is an integer number (156607659).

Almost surely, 2^313215317 is an apocalyptic number.

It is an amenable number.

313215317 is a deficient number, since it is larger than the sum of its proper divisors (1).

313215317 is an equidigital number, since it uses as much as digits as its factorization.

313215317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1890, while the sum is 26.

The square root of 313215317 is about 17697.8901849910. The cubic root of 313215317 is about 679.1217880006.

The spelling of 313215317 in words is "three hundred thirteen million, two hundred fifteen thousand, three hundred seventeen".