8243281 has 2 divisors, whose sum is σ = 8243282. Its totient is φ = 8243280.

The previous prime is 8243251. The next prime is 8243297. The reversal of 8243281 is 1823428.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7617600 + 625681 = 2760^2 + 791^2 .

It is a cyclic number.

It is not a de Polignac number, because 8243281 - 2¹⁹ = 7718993 is a prime.

It is a super-2 number, since 2×8243281² = 135903363289922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8243201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4121640 + 4121641.

It is an arithmetic number, because the mean of its divisors is an integer number (4121641).

Almost surely, 2^8243281 is an apocalyptic number.

It is an amenable number.

8243281 is a deficient number, since it is larger than the sum of its proper divisors (1).

8243281 is an equidigital number, since it uses as much as digits as its factorization.

8243281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3072, while the sum is 28.

The square root of 8243281 is about 2871.1114572583. Note that the first 3 decimals coincide. The cubic root of 8243281 is about 202.0071314020.

The spelling of 8243281 in words is "eight million, two hundred forty-three thousand, two hundred eighty-one".