320303221 has 16 divisors (see below), whose sum is σ = 389193984. Its totient is φ = 257647104.

The previous prime is 320303147. The next prime is 320303233. The reversal of 320303221 is 122303023.

It is not a de Polignac number, because 320303221 - 2¹¹ = 320301173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320303195 and 320303204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320303251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10236 + ... + 27301.

It is an arithmetic number, because the mean of its divisors is an integer number (24324624).

Almost surely, 2^320303221 is an apocalyptic number.

It is an amenable number.

320303221 is a deficient number, since it is larger than the sum of its proper divisors (68890763).

320303221 is a wasteful number, since it uses less digits than its factorization.

320303221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37620.

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

The square root of 320303221 is about 17897.0170978295. The cubic root of 320303221 is about 684.2063523922.

Adding to 320303221 its reverse (122303023), we get a palindrome (442606244).

The spelling of 320303221 in words is "three hundred twenty million, three hundred three thousand, two hundred twenty-one".