16268281 has 2 divisors, whose sum is σ = 16268282. Its totient is φ = 16268280.

The previous prime is 16268261. The next prime is 16268309. The reversal of 16268281 is 18286261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15093225 + 1175056 = 3885^2 + 1084^2 .

It is a cyclic number.

It is not a de Polignac number, because 16268281 - 2¹⁹ = 15743993 is a prime.

It is a super-2 number, since 2×16268281² = 529313933389922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16268261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8134140 + 8134141.

It is an arithmetic number, because the mean of its divisors is an integer number (8134141).

Almost surely, 2^16268281 is an apocalyptic number.

It is an amenable number.

16268281 is a deficient number, since it is larger than the sum of its proper divisors (1).

16268281 is an equidigital number, since it uses as much as digits as its factorization.

16268281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9216, while the sum is 34.

The square root of 16268281 is about 4033.3957157710. The cubic root of 16268281 is about 253.3847977546.

The spelling of 16268281 in words is "sixteen million, two hundred sixty-eight thousand, two hundred eighty-one".