320021323 has 4 divisors (see below), whose sum is σ = 321984808. Its totient is φ = 318057840.

The previous prime is 320021297. The next prime is 320021363. The reversal of 320021323 is 323120023.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 320021323 - 2⁵ = 320021291 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320021297 and 320021306.

It is not an unprimeable number, because it can be changed into a prime (320021363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 981498 + ... + 981823.

It is an arithmetic number, because the mean of its divisors is an integer number (80496202).

Almost surely, 2^320021323 is an apocalyptic number.

320021323 is a deficient number, since it is larger than the sum of its proper divisors (1963485).

320021323 is a wasteful number, since it uses less digits than its factorization.

320021323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1963484.

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

The square root of 320021323 is about 17889.1398060387. The cubic root of 320021323 is about 684.0055707570.

Adding to 320021323 its reverse (323120023), we get a palindrome (643141346).

The spelling of 320021323 in words is "three hundred twenty million, twenty-one thousand, three hundred twenty-three".