3221220300 has 144 divisors (see below), whose sum is σ = 9673880832. Its totient is φ = 826963200.

The previous prime is 3221220293. The next prime is 3221220307. The reversal of 3221220300 is 30221223.

It is an interprime number because it is at equal distance from previous prime (3221220293) and next prime (3221220307).

It is a super-2 number, since 2×3221220300² = 20752520442264180000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 3221220300.

It is not an unprimeable number, because it can be changed into a prime (3221220307) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 914142 + ... + 917658.

It is an arithmetic number, because the mean of its divisors is an integer number (67179728).

Almost surely, 2^3221220300 is an apocalyptic number.

3221220300 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3221220300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4836940416).

3221220300 is an abundant number, since it is smaller than the sum of its proper divisors (6452660532).

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

3221220300 is a wasteful number, since it uses less digits than its factorization.

3221220300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3648 (or 3641 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 3221220300 is about 56755.7952988063. The cubic root of 3221220300 is about 1476.8627695769.

Adding to 3221220300 its reverse (30221223), we get a palindrome (3251441523).

The spelling of 3221220300 in words is "three billion, two hundred twenty-one million, two hundred twenty thousand, three hundred".