3221232220 has 24 divisors (see below), whose sum is σ = 6768813744. Its totient is φ = 1287687936.

The previous prime is 3221232187. The next prime is 3221232257. The reversal of 3221232220 is 222321223.

It is a super-2 number, since 2×3221232220² = 20752674030332256800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16957 + ... + 82036.

It is an arithmetic number, because the mean of its divisors is an integer number (282033906).

Almost surely, 2^3221232220 is an apocalyptic number.

It is an amenable number.

3221232220 is an abundant number, since it is smaller than the sum of its proper divisors (3547581524).

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

3221232220 is a wasteful number, since it uses less digits than its factorization.

3221232220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100629 (or 100627 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 3221232220 is about 56755.9003100118. The cubic root of 3221232220 is about 1476.8645912657.

Adding to 3221232220 its reverse (222321223), we get a palindrome (3443553443).

The spelling of 3221232220 in words is "three billion, two hundred twenty-one million, two hundred thirty-two thousand, two hundred twenty".