800221 has 2 divisors, whose sum is σ = 800222. Its totient is φ = 800220.

The previous prime is 800213. The next prime is 800231. The reversal of 800221 is 122008.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 765625 + 34596 = 875^2 + 186^2 .

It is a cyclic number.

It is not a de Polignac number, because 800221 - 2³ = 800213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (800231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400110 + 400111.

It is an arithmetic number, because the mean of its divisors is an integer number (400111).

2⁸⁰⁰²²¹ is an apocalyptic number.

It is an amenable number.

800221 is a deficient number, since it is larger than the sum of its proper divisors (1).

800221 is an equidigital number, since it uses as much as digits as its factorization.

800221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 800221 is about 894.5507252247. The cubic root of 800221 is about 92.8403241447.

Adding to 800221 its reverse (122008), we get a palindrome (922229).

The spelling of 800221 in words is "eight hundred thousand, two hundred twenty-one".