3221220222 has 48 divisors (see below), whose sum is σ = 7819589232. Its totient is φ = 949743360.

The previous prime is 3221220217. The next prime is 3221220241. The reversal of 3221220222 is 2220221223.

3221220222 is a `hidden beast` number, since 3 + 221 + 220 + 222 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 3221220195 and 3221220204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 212523 + ... + 227174.

It is an arithmetic number, because the mean of its divisors is an integer number (162908109).

Almost surely, 2^3221220222 is an apocalyptic number.

3221220222 is an abundant number, since it is smaller than the sum of its proper divisors (4598369010).

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

3221220222 is a wasteful number, since it uses less digits than its factorization.

3221220222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439753 (or 439750 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 3221220222 is about 56755.7946116518. The cubic root of 3221220222 is about 1476.8627576565.

Adding to 3221220222 its reverse (2220221223), we get a palindrome (5441441445).

The spelling of 3221220222 in words is "three billion, two hundred twenty-one million, two hundred twenty thousand, two hundred twenty-two".