3204221 has 4 divisors (see below), whose sum is σ = 3264732. Its totient is φ = 3143712.

The previous prime is 3204209. The next prime is 3204247. The reversal of 3204221 is 1224023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1224023 = 67 ⋅18269.

It can be written as a sum of positive squares in 2 ways, for example, as 2292196 + 912025 = 1514^2 + 955^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3204221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3204196 and 3204205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3204251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30176 + ... + 30281.

It is an arithmetic number, because the mean of its divisors is an integer number (816183).

Almost surely, 2^3204221 is an apocalyptic number.

It is an amenable number.

3204221 is a deficient number, since it is larger than the sum of its proper divisors (60511).

3204221 is an equidigital number, since it uses as much as digits as its factorization.

3204221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60510.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 3204221 is about 1790.0337985636. The cubic root of 3204221 is about 147.4260243818.

Adding to 3204221 its reverse (1224023), we get a palindrome (4428244).

The spelling of 3204221 in words is "three million, two hundred four thousand, two hundred twenty-one".