9218281 has 2 divisors, whose sum is σ = 9218282. Its totient is φ = 9218280.

The previous prime is 9218269. The next prime is 9218303. The reversal of 9218281 is 1828129.

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., 9211225 + 7056 = 3035^2 + 84^2 .

It is a cyclic number.

It is not a de Polignac number, because 9218281 - 2¹⁵ = 9185513 is a prime.

It is a super-2 number, since 2×9218281² = 169953409189922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9218581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4609140 + 4609141.

It is an arithmetic number, because the mean of its divisors is an integer number (4609141).

Almost surely, 2^9218281 is an apocalyptic number.

It is an amenable number.

9218281 is a deficient number, since it is larger than the sum of its proper divisors (1).

9218281 is an equidigital number, since it uses as much as digits as its factorization.

9218281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 31.

The square root of 9218281 is about 3036.1622156927. The cubic root of 9218281 is about 209.6766073064.

The spelling of 9218281 in words is "nine million, two hundred eighteen thousand, two hundred eighty-one".