318241213 has 2 divisors, whose sum is σ = 318241214. Its totient is φ = 318241212.

The previous prime is 318241201. The next prime is 318241243. The reversal of 318241213 is 312142813.

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., 196756729 + 121484484 = 14027^2 + 11022^2 .

It is a cyclic number.

It is not a de Polignac number, because 318241213 - 2⁹ = 318240701 is a prime.

It is a super-2 number, since 2×318241213² = 202554939303422738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318241243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159120606 + 159120607.

It is an arithmetic number, because the mean of its divisors is an integer number (159120607).

Almost surely, 2^318241213 is an apocalyptic number.

It is an amenable number.

318241213 is a deficient number, since it is larger than the sum of its proper divisors (1).

318241213 is an equidigital number, since it uses as much as digits as its factorization.

318241213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 25.

The square root of 318241213 is about 17839.3164947539. The cubic root of 318241213 is about 682.7349577244.

The spelling of 318241213 in words is "three hundred eighteen million, two hundred forty-one thousand, two hundred thirteen".