318264217 has 2 divisors, whose sum is σ = 318264218. Its totient is φ = 318264216.

The previous prime is 318264211. The next prime is 318264239. The reversal of 318264217 is 712462813.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 298736656 + 19527561 = 17284^2 + 4419^2 .

It is a cyclic number.

It is not a de Polignac number, because 318264217 - 2³ = 318264209 is a prime.

It is a super-2 number, since 2×318264217² = 202584223645246178, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (318264211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159132108 + 159132109.

It is an arithmetic number, because the mean of its divisors is an integer number (159132109).

Almost surely, 2^318264217 is an apocalyptic number.

It is an amenable number.

318264217 is a deficient number, since it is larger than the sum of its proper divisors (1).

318264217 is an equidigital number, since it uses as much as digits as its factorization.

318264217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 34.

The square root of 318264217 is about 17839.9612387471. The cubic root of 318264217 is about 682.7514077796.

The spelling of 318264217 in words is "three hundred eighteen million, two hundred sixty-four thousand, two hundred seventeen".