320341221 has 24 divisors (see below), whose sum is σ = 481386360. Its totient is φ = 205027200.

The previous prime is 320341193. The next prime is 320341223. The reversal of 320341221 is 122143023.

320341221 is a `hidden beast` number, since 320 + 341 + 2 + 2 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 324900 + 320016321 = 570^2 + 17889^2 .

It is not a de Polignac number, because 320341221 - 2⁶ = 320341157 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 320341194 and 320341203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320341223) 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 23 ways as a sum of consecutive naturals, for example, 43851 + ... + 50631.

It is an arithmetic number, because the mean of its divisors is an integer number (20057765).

Almost surely, 2^320341221 is an apocalyptic number.

It is an amenable number.

320341221 is a deficient number, since it is larger than the sum of its proper divisors (161045139).

320341221 is a wasteful number, since it uses less digits than its factorization.

320341221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6997 (or 6994 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 320341221 is about 17898.0786957707. The cubic root of 320341221 is about 684.2334088516.

Adding to 320341221 its reverse (122143023), we get a palindrome (442484244).

The spelling of 320341221 in words is "three hundred twenty million, three hundred forty-one thousand, two hundred twenty-one".