2243281 has 2 divisors, whose sum is σ = 2243282. Its totient is φ = 2243280.

The previous prime is 2243261. The next prime is 2243287. The reversal of 2243281 is 1823422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1404225 + 839056 = 1185^2 + 916^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2243281 is a prime.

It is a super-2 number, since 2×2243281² = 10064619289922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2243287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1121640 + 1121641.

It is an arithmetic number, because the mean of its divisors is an integer number (1121641).

2^2243281 is an apocalyptic number.

It is an amenable number.

2243281 is a deficient number, since it is larger than the sum of its proper divisors (1).

2243281 is an equidigital number, since it uses as much as digits as its factorization.

2243281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768, while the sum is 22.

The square root of 2243281 is about 1497.7586587965. The cubic root of 2243281 is about 130.9065043885.

The spelling of 2243281 in words is "two million, two hundred forty-three thousand, two hundred eighty-one".