16382281 has 2 divisors, whose sum is σ = 16382282. Its totient is φ = 16382280.

The previous prime is 16382257. The next prime is 16382287. The reversal of 16382281 is 18228361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12362256 + 4020025 = 3516^2 + 2005^2 .

It is a cyclic number.

It is not a de Polignac number, because 16382281 - 2⁹ = 16381769 is a prime.

It is a super-2 number, since 2×16382281² = 536758261525922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16382287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8191140 + 8191141.

It is an arithmetic number, because the mean of its divisors is an integer number (8191141).

Almost surely, 2^16382281 is an apocalyptic number.

It is an amenable number.

16382281 is a deficient number, since it is larger than the sum of its proper divisors (1).

16382281 is an equidigital number, since it uses as much as digits as its factorization.

16382281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4608, while the sum is 31.

The square root of 16382281 is about 4047.5030574417. The cubic root of 16382281 is about 253.9752853792.

The spelling of 16382281 in words is "sixteen million, three hundred eighty-two thousand, two hundred eighty-one".