3221215 has 8 divisors (see below), whose sum is σ = 3886848. Its totient is φ = 2562720.

The previous prime is 3221189. The next prime is 3221237. The reversal of 3221215 is 5121223.

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

It is not a de Polignac number, because 3221215 - 2⁹ = 3220703 is a prime.

It is a Duffinian number.

3221215 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 732 + ... + 2641.

It is an arithmetic number, because the mean of its divisors is an integer number (485856).

Almost surely, 2^3221215 is an apocalyptic number.

3221215 is a deficient number, since it is larger than the sum of its proper divisors (665633).

3221215 is a wasteful number, since it uses less digits than its factorization.

3221215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3569.

The product of its digits is 120, while the sum is 16.

The square root of 3221215 is about 1794.7743590769. The cubic root of 3221215 is about 147.6861959596.

Adding to 3221215 its reverse (5121223), we get a palindrome (8342438).

The spelling of 3221215 in words is "three million, two hundred twenty-one thousand, two hundred fifteen".