220321220 has 24 divisors (see below), whose sum is σ = 528771264. Its totient is φ = 75538656.

The previous prime is 220321201. The next prime is 220321229. The reversal of 220321220 is 22123022.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 220321195 and 220321204.

It is not an unprimeable number, because it can be changed into a prime (220321229) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 786722 + ... + 787001.

It is an arithmetic number, because the mean of its divisors is an integer number (22032136).

Almost surely, 2^220321220 is an apocalyptic number.

220321220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220321220 is an abundant number, since it is smaller than the sum of its proper divisors (308450044).

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

220321220 is a wasteful number, since it uses less digits than its factorization.

220321220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1573739 (or 1573737 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 220321220 is about 14843.2213484809. The cubic root of 220321220 is about 603.9747405486.

Adding to 220321220 its reverse (22123022), we get a palindrome (242444242).

The spelling of 220321220 in words is "two hundred twenty million, three hundred twenty-one thousand, two hundred twenty".