32221303220 has 12 divisors (see below), whose sum is σ = 67664736804. Its totient is φ = 12888521280.

The previous prime is 32221303189. The next prime is 32221303291. The reversal of 32221303220 is 2230312223.

It can be written as a sum of positive squares in 2 ways, for example, as 21896304676 + 10324998544 = 147974^2 + 101612^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 1611065161 = 32221303220 / (3 + 2 + 2 + 2 + 1 + 3 + 0 + 3 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 32221303192 and 32221303201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 805532561 + ... + 805532600.

It is an arithmetic number, because the mean of its divisors is an integer number (5638728067).

Almost surely, 2^32221303220 is an apocalyptic number.

It is an amenable number.

32221303220 is an abundant number, since it is smaller than the sum of its proper divisors (35443433584).

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

32221303220 is a wasteful number, since it uses less digits than its factorization.

32221303220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1611065170 (or 1611065168 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 32221303220 its reverse (2230312223), we get a palindrome (34451615443).

The spelling of 32221303220 in words is "thirty-two billion, two hundred twenty-one million, three hundred three thousand, two hundred twenty".