313218361 has 2 divisors, whose sum is σ = 313218362. Its totient is φ = 313218360.

The previous prime is 313218341. The next prime is 313218379. The reversal of 313218361 is 163812313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 271227961 + 41990400 = 16469^2 + 6480^2 .

It is a cyclic number.

It is not a de Polignac number, because 313218361 - 2⁵ = 313218329 is a prime.

It is not a weakly prime, because it can be changed into another prime (313218341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156609180 + 156609181.

It is an arithmetic number, because the mean of its divisors is an integer number (156609181).

Almost surely, 2^313218361 is an apocalyptic number.

It is an amenable number.

313218361 is a deficient number, since it is larger than the sum of its proper divisors (1).

313218361 is an equidigital number, since it uses as much as digits as its factorization.

313218361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 28.

The square root of 313218361 is about 17697.9761837336. The cubic root of 313218361 is about 679.1239880208.

The spelling of 313218361 in words is "three hundred thirteen million, two hundred eighteen thousand, three hundred sixty-one".