320313321 has 24 divisors (see below), whose sum is σ = 479473280. Its totient is φ = 205916256.

The previous prime is 320313317. The next prime is 320313373. The reversal of 320313321 is 123313023.

320313321 is a `hidden beast` number, since 32 + 0 + 313 + 321 = 666.

It is not a de Polignac number, because 320313321 - 2² = 320313317 is a prime.

It is a super-2 number, since 2×320313321² = 205201247220098082, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 320313294 and 320313303.

It is not an unprimeable number, because it can be changed into a prime (320313391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25335 + ... + 35811.

Almost surely, 2^320313321 is an apocalyptic number.

It is an amenable number.

320313321 is a deficient number, since it is larger than the sum of its proper divisors (159159959).

320313321 is a wasteful number, since it uses less digits than its factorization.

320313321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10605 (or 10602 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 320313321 is about 17897.2992655317. The cubic root of 320313321 is about 684.2135439231.

Adding to 320313321 its reverse (123313023), we get a palindrome (443626344).

The spelling of 320313321 in words is "three hundred twenty million, three hundred thirteen thousand, three hundred twenty-one".