3221205 has 16 divisors (see below), whose sum is σ = 5550720. Its totient is φ = 1585728.

The previous prime is 3221189. The next prime is 3221237. The reversal of 3221205 is 5021223.

3221205 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3221205 - 2⁴ = 3221189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8065 + ... + 8454.

It is an arithmetic number, because the mean of its divisors is an integer number (346920).

Almost surely, 2^3221205 is an apocalyptic number.

It is an amenable number.

3221205 is a deficient number, since it is larger than the sum of its proper divisors (2329515).

3221205 is a wasteful number, since it uses less digits than its factorization.

3221205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16540.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 3221205 is about 1794.7715732092. The cubic root of 3221205 is about 147.6860431329.

Adding to 3221205 its reverse (5021223), we get a palindrome (8242428).

The spelling of 3221205 in words is "three million, two hundred twenty-one thousand, two hundred five".