320030221 has 12 divisors (see below), whose sum is σ = 375218688. Its totient is φ = 272146392.

The previous prime is 320030189. The next prime is 320030231. The reversal of 320030221 is 122030023.

It is a happy number.

It is not a de Polignac number, because 320030221 - 2⁵ = 320030189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320030231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19491 + ... + 31936.

It is an arithmetic number, because the mean of its divisors is an integer number (31268224).

Almost surely, 2^320030221 is an apocalyptic number.

It is an amenable number.

320030221 is a deficient number, since it is larger than the sum of its proper divisors (55188467).

320030221 is a wasteful number, since it uses less digits than its factorization.

320030221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51568 (or 51561 counting only the distinct ones).

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

The square root of 320030221 is about 17889.3885026850. The cubic root of 320030221 is about 684.0119101525.

Adding to 320030221 its reverse (122030023), we get a palindrome (442060244).

The spelling of 320030221 in words is "three hundred twenty million, thirty thousand, two hundred twenty-one".