8582221 has 2 divisors, whose sum is σ = 8582222. Its totient is φ = 8582220.

The previous prime is 8582213. The next prime is 8582293. The reversal of 8582221 is 1222858.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8185321 + 396900 = 2861^2 + 630^2 .

It is a cyclic number.

It is not a de Polignac number, because 8582221 - 2³ = 8582213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8582221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8582201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4291110 + 4291111.

It is an arithmetic number, because the mean of its divisors is an integer number (4291111).

Almost surely, 2^8582221 is an apocalyptic number.

It is an amenable number.

8582221 is a deficient number, since it is larger than the sum of its proper divisors (1).

8582221 is an equidigital number, since it uses as much as digits as its factorization.

8582221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2560, while the sum is 28.

The square root of 8582221 is about 2929.5427970931. The cubic root of 8582221 is about 204.7386795200.

The spelling of 8582221 in words is "eight million, five hundred eighty-two thousand, two hundred twenty-one".