318318331 has 2 divisors, whose sum is σ = 318318332. Its totient is φ = 318318330.

The previous prime is 318318317. The next prime is 318318349. The reversal of 318318331 is 133813813.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 318318331 - 2¹¹ = 318316283 is a prime.

It is a super-2 number, since 2×318318331² = 202653119701251122, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 318318293 and 318318302.

It is not a weakly prime, because it can be changed into another prime (318318391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159159165 + 159159166.

It is an arithmetic number, because the mean of its divisors is an integer number (159159166).

Almost surely, 2^318318331 is an apocalyptic number.

318318331 is a deficient number, since it is larger than the sum of its proper divisors (1).

318318331 is an equidigital number, since it uses as much as digits as its factorization.

318318331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 31.

The square root of 318318331 is about 17841.4778255614. The cubic root of 318318331 is about 682.7901013282.

The spelling of 318318331 in words is "three hundred eighteen million, three hundred eighteen thousand, three hundred thirty-one".