3209221 has 2 divisors, whose sum is σ = 3209222. Its totient is φ = 3209220.

The previous prime is 3209201. The next prime is 3209231. The reversal of 3209221 is 1229023.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1920996 + 1288225 = 1386^2 + 1135^2 .

It is an emirp because it is prime and its reverse (1229023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3209221 - 2¹¹ = 3207173 is a prime.

It is a Chen prime.

3209221 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3209201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1604610 + 1604611.

It is an arithmetic number, because the mean of its divisors is an integer number (1604611).

Almost surely, 2^3209221 is an apocalyptic number.

It is an amenable number.

3209221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3209221 is an equidigital number, since it uses as much as digits as its factorization.

3209221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 3209221 is about 1791.4298758255. The cubic root of 3209221 is about 147.5026677675.

The spelling of 3209221 in words is "three million, two hundred nine thousand, two hundred twenty-one".