320301221 has 6 divisors (see below), whose sum is σ = 338046822. Its totient is φ = 303442920.

The previous prime is 320301203. The next prime is 320301229. The reversal of 320301221 is 122103023.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 181980100 + 138321121 = 13490^2 + 11761^2 .

It is a de Polignac number, because none of the positive numbers 2^k-320301221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 320301196 and 320301205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320301229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 443270 + ... + 443991.

It is an arithmetic number, because the mean of its divisors is an integer number (56341137).

Almost surely, 2^320301221 is an apocalyptic number.

It is an amenable number.

320301221 is a deficient number, since it is larger than the sum of its proper divisors (17745601).

320301221 is an equidigital number, since it uses as much as digits as its factorization.

320301221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887299 (or 887280 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 320301221 is about 17896.9612225093. The cubic root of 320301221 is about 684.2049283087.

Adding to 320301221 its reverse (122103023), we get a palindrome (442404244).

The spelling of 320301221 in words is "three hundred twenty million, three hundred one thousand, two hundred twenty-one".