3211216 has 20 divisors (see below), whose sum is σ = 6249600. Its totient is φ = 1598432.

The previous prime is 3211213. The next prime is 3211279. The reversal of 3211216 is 6121123.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a self number, because there is not a number n which added to its sum of digits gives 3211216.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3211213) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 6465 + ... + 6943.

It is an arithmetic number, because the mean of its divisors is an integer number (312480).

Almost surely, 2^3211216 is an apocalyptic number.

It is an amenable number.

3211216 is a deficient number, since it is larger than the sum of its proper divisors (3038384).

3211216 is a wasteful number, since it uses less digits than its factorization.

3211216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906 (or 900 counting only the distinct ones).

The product of its digits is 72, while the sum is 16.

The square root of 3211216 is about 1791.9866070928. The cubic root of 3211216 is about 147.5332262599.

Adding to 3211216 its reverse (6121123), we get a palindrome (9332339).

The spelling of 3211216 in words is "three million, two hundred eleven thousand, two hundred sixteen".