282009281 has 2 divisors, whose sum is σ = 282009282. Its totient is φ = 282009280.

The previous prime is 282009257. The next prime is 282009331. The reversal of 282009281 is 182900282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 275858881 + 6150400 = 16609^2 + 2480^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-282009281 is a prime.

It is a super-2 number, since 2×282009281² = 159058469140273922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (282009251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 141004640 + 141004641.

It is an arithmetic number, because the mean of its divisors is an integer number (141004641).

Almost surely, 2^282009281 is an apocalyptic number.

It is an amenable number.

282009281 is a deficient number, since it is larger than the sum of its proper divisors (1).

282009281 is an equidigital number, since it uses as much as digits as its factorization.

282009281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 282009281 is about 16793.1319592267. The cubic root of 282009281 is about 655.7744125990.

The spelling of 282009281 in words is "two hundred eighty-two million, nine thousand, two hundred eighty-one".