282288221 has 4 divisors (see below), whose sum is σ = 282332700. Its totient is φ = 282243744.

The previous prime is 282288203. The next prime is 282288241. The reversal of 282288221 is 122882282.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 199204996 + 83083225 = 14114^2 + 9115^2 .

It is a cyclic number.

It is not a de Polignac number, because 282288221 - 2¹⁰ = 282287197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (282288241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10736 + ... + 26073.

It is an arithmetic number, because the mean of its divisors is an integer number (70583175).

Almost surely, 2^282288221 is an apocalyptic number.

It is an amenable number.

282288221 is a deficient number, since it is larger than the sum of its proper divisors (44479).

282288221 is an equidigital number, since it uses as much as digits as its factorization.

282288221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44478.

The product of its digits is 16384, while the sum is 35.

The square root of 282288221 is about 16801.4350875156. The cubic root of 282288221 is about 655.9905537567.

The spelling of 282288221 in words is "two hundred eighty-two million, two hundred eighty-eight thousand, two hundred twenty-one".