3221220216 has 16 divisors (see below), whose sum is σ = 8053050600. Its totient is φ = 1073740064.

The previous prime is 3221220209. The next prime is 3221220217. The reversal of 3221220216 is 6120221223.

It is a junction number, because it is equal to n+sod(n) for n = 3221220192 and 3221220201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3221220217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67108731 + ... + 67108778.

Almost surely, 2^3221220216 is an apocalyptic number.

It is an amenable number.

3221220216 is an abundant number, since it is smaller than the sum of its proper divisors (4831830384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3221220216 is a wasteful number, since it uses less digits than its factorization.

3221220216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134217518 (or 134217514 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 3221220216 is about 56755.7945587937. The cubic root of 3221220216 is about 1476.8627567395.

Adding to 3221220216 its reverse (6120221223), we get a palindrome (9341441439).

The spelling of 3221220216 in words is "three billion, two hundred twenty-one million, two hundred twenty thousand, two hundred sixteen".