3221516 has 12 divisors (see below), whose sum is σ = 5790288. Its totient is φ = 1567152.

The previous prime is 3221513. The next prime is 3221539. The reversal of 3221516 is 6151223.

It is not an unprimeable number, because it can be changed into a prime (3221513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10736 + ... + 11031.

It is an arithmetic number, because the mean of its divisors is an integer number (482524).

Almost surely, 2^3221516 is an apocalyptic number.

It is an amenable number.

3221516 is a deficient number, since it is larger than the sum of its proper divisors (2568772).

3221516 is a wasteful number, since it uses less digits than its factorization.

3221516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21808 (or 21806 counting only the distinct ones).

The product of its digits is 360, while the sum is 20.

The square root of 3221516 is about 1794.8582116702. The cubic root of 3221516 is about 147.6907958969.

Adding to 3221516 its reverse (6151223), we get a palindrome (9372739).

The spelling of 3221516 in words is "three million, two hundred twenty-one thousand, five hundred sixteen".