318865229 has 2 divisors, whose sum is σ = 318865230. Its totient is φ = 318865228.

The previous prime is 318865213. The next prime is 318865231. The reversal of 318865229 is 922568813.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 172213129 + 146652100 = 13123^2 + 12110^2 .

It is a cyclic number.

It is not a de Polignac number, because 318865229 - 2⁴ = 318865213 is a prime.

Together with 318865231, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 318865229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318865259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159432614 + 159432615.

It is an arithmetic number, because the mean of its divisors is an integer number (159432615).

Almost surely, 2^318865229 is an apocalyptic number.

It is an amenable number.

318865229 is a deficient number, since it is larger than the sum of its proper divisors (1).

318865229 is an equidigital number, since it uses as much as digits as its factorization.

318865229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 44.

The square root of 318865229 is about 17856.7978372383. The cubic root of 318865229 is about 683.1809081135.

The spelling of 318865229 in words is "three hundred eighteen million, eight hundred sixty-five thousand, two hundred twenty-nine".