8183221 has 2 divisors, whose sum is σ = 8183222. Its totient is φ = 8183220.

The previous prime is 8183209. The next prime is 8183233. The reversal of 8183221 is 1223818.

8183221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (8183209) and next prime (8183233).

It can be written as a sum of positive squares in only one way, i.e., 6195121 + 1988100 = 2489^2 + 1410^2 .

It is a cyclic number.

It is not a de Polignac number, because 8183221 - 2⁹ = 8182709 is a prime.

It is an Ulam number.

8183221 is a lucky number.

It is equal to p₅₅₁₂₆₆ and since 8183221 and 551266 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8183321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4091610 + 4091611.

It is an arithmetic number, because the mean of its divisors is an integer number (4091611).

Almost surely, 2^8183221 is an apocalyptic number.

It is an amenable number.

8183221 is a deficient number, since it is larger than the sum of its proper divisors (1).

8183221 is an equidigital number, since it uses as much as digits as its factorization.

8183221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768, while the sum is 25.

The square root of 8183221 is about 2860.6329719137. The cubic root of 8183221 is about 201.5153315223.

The spelling of 8183221 in words is "eight million, one hundred eighty-three thousand, two hundred twenty-one".