320021222 has 12 divisors (see below), whose sum is σ = 491460660. Its totient is φ = 156287628.

The previous prime is 320021201. The next prime is 320021231. The reversal of 320021222 is 222120023.

It is a junction number, because it is equal to n+sod(n) for n = 320021197 and 320021206.

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 5 ways as a sum of consecutive naturals, for example, 39572 + ... + 46967.

It is an arithmetic number, because the mean of its divisors is an integer number (40955055).

Almost surely, 2^320021222 is an apocalyptic number.

320021222 is a deficient number, since it is larger than the sum of its proper divisors (171439438).

320021222 is an equidigital number, since it uses as much as digits as its factorization.

320021222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86627 (or 86584 counting only the distinct ones).

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

The square root of 320021222 is about 17889.1369830968. The cubic root of 320021222 is about 684.0054987987.

Adding to 320021222 its reverse (222120023), we get a palindrome (542141245).

The spelling of 320021222 in words is "three hundred twenty million, twenty-one thousand, two hundred twenty-two".