320221330 has 64 divisors (see below), whose sum is σ = 688455936. Its totient is φ = 105696000.

The previous prime is 320221327. The next prime is 320221337. The reversal of 320221330 is 33122023.

It is not an unprimeable number, because it can be changed into a prime (320221337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85395 + ... + 89065.

It is an arithmetic number, because the mean of its divisors is an integer number (10757124).

Almost surely, 2^320221330 is an apocalyptic number.

320221330 is an abundant number, since it is smaller than the sum of its proper divisors (368234606).

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

320221330 is a wasteful number, since it uses less digits than its factorization.

320221330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3763.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 320221330 is about 17894.7291122274. The cubic root of 320221330 is about 684.1480377344.

Adding to 320221330 its reverse (33122023), we get a palindrome (353343353).

The spelling of 320221330 in words is "three hundred twenty million, two hundred twenty-one thousand, three hundred thirty".