318212017 has 2 divisors, whose sum is σ = 318212018. Its totient is φ = 318212016.

The previous prime is 318211991. The next prime is 318212047. The reversal of 318212017 is 710212813.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 312016896 + 6195121 = 17664^2 + 2489^2 .

It is a cyclic number.

It is not a de Polignac number, because 318212017 - 2⁷ = 318211889 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 318211982 and 318212000.

It is not a weakly prime, because it can be changed into another prime (318212047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159106008 + 159106009.

It is an arithmetic number, because the mean of its divisors is an integer number (159106009).

Almost surely, 2^318212017 is an apocalyptic number.

It is an amenable number.

318212017 is a deficient number, since it is larger than the sum of its proper divisors (1).

318212017 is an equidigital number, since it uses as much as digits as its factorization.

318212017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 318212017 is about 17838.4981710905. The cubic root of 318212017 is about 682.7140786568.

The spelling of 318212017 in words is "three hundred eighteen million, two hundred twelve thousand, seventeen".