3221320000 has 140 divisors (see below), whose sum is σ = 8266244580. Its totient is φ = 1243648000.

The previous prime is 3221319991. The next prime is 3221320009. The reversal of 3221320000 is 231223.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3221319991) and next prime (3221320009).

It can be written as a sum of positive squares in 10 ways, for example, as 2895300864 + 326019136 = 53808^2 + 18056^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3221320009) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1158612 + ... + 1161388.

Almost surely, 2^3221320000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3221320000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4133122290).

3221320000 is an abundant number, since it is smaller than the sum of its proper divisors (5044924580).

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

3221320000 is an equidigital number, since it uses as much as digits as its factorization.

3221320000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2838 (or 2813 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 3221320000 is about 56756.6736164127. The cubic root of 3221320000 is about 1476.8780062145.

Adding to 3221320000 its reverse (231223), we get a palindrome (3221551223).

The spelling of 3221320000 in words is "three billion, two hundred twenty-one million, three hundred twenty thousand".