8202221 has 2 divisors, whose sum is σ = 8202222. Its totient is φ = 8202220.

The previous prime is 8202193. The next prime is 8202253. The reversal of 8202221 is 1222028.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8185321 + 16900 = 2861^2 + 130^2 .

It is a cyclic number.

It is not a de Polignac number, because 8202221 - 2¹⁰ = 8201197 is a prime.

It is a super-3 number, since 3×8202221³ (a number of 22 digits) contains 333 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8202221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8202521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4101110 + 4101111.

It is an arithmetic number, because the mean of its divisors is an integer number (4101111).

Almost surely, 2^8202221 is an apocalyptic number.

It is an amenable number.

8202221 is a deficient number, since it is larger than the sum of its proper divisors (1).

8202221 is an equidigital number, since it uses as much as digits as its factorization.

8202221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 8202221 is about 2863.9519898211. The cubic root of 8202221 is about 201.6711720263.

Adding to 8202221 its reverse (1222028), we get a palindrome (9424249).

The spelling of 8202221 in words is "eight million, two hundred two thousand, two hundred twenty-one".