3223221 has 8 divisors (see below), whose sum is σ = 4308864. Its totient is φ = 2143200.

The previous prime is 3223211. The next prime is 3223223. The reversal of 3223221 is 1223223.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3223221 - 2⁵ = 3223189 is a prime.

It is a super-2 number, since 2×3223221² = 20778307229682, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3223221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3223223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196 + ... + 2546.

It is an arithmetic number, because the mean of its divisors is an integer number (538608).

Almost surely, 2^3223221 is an apocalyptic number.

It is an amenable number.

3223221 is a deficient number, since it is larger than the sum of its proper divisors (1085643).

3223221 is a wasteful number, since it uses less digits than its factorization.

3223221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2811.

The product of its digits is 144, while the sum is 15.

The square root of 3223221 is about 1795.3331167224. Note that the first 3 decimals coincide. The cubic root of 3223221 is about 147.7168466129.

Adding to 3223221 its reverse (1223223), we get a palindrome (4446444).

The spelling of 3223221 in words is "three million, two hundred twenty-three thousand, two hundred twenty-one".