8318281 has 2 divisors, whose sum is σ = 8318282. Its totient is φ = 8318280.

The previous prime is 8318279. The next prime is 8318291. The reversal of 8318281 is 1828138.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8173881 + 144400 = 2859^2 + 380^2 .

It is a cyclic number.

It is not a de Polignac number, because 8318281 - 2¹ = 8318279 is a prime.

It is a super-2 number, since 2×8318281² = 138387597589922, which contains 22 as substring.

Together with 8318279, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8318231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4159140 + 4159141.

It is an arithmetic number, because the mean of its divisors is an integer number (4159141).

Almost surely, 2^8318281 is an apocalyptic number.

It is an amenable number.

8318281 is a deficient number, since it is larger than the sum of its proper divisors (1).

8318281 is an equidigital number, since it uses as much as digits as its factorization.

8318281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3072, while the sum is 31.

The square root of 8318281 is about 2884.1430269666. The cubic root of 8318281 is about 202.6179245062.

The spelling of 8318281 in words is "eight million, three hundred eighteen thousand, two hundred eighty-one".