320544321 has 4 divisors (see below), whose sum is σ = 427392432. Its totient is φ = 213696212.

The previous prime is 320544233. The next prime is 320544347. The reversal of 320544321 is 123445023.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 320544321 - 2¹¹ = 320542273 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 320544291 and 320544300.

It is not an unprimeable number, because it can be changed into a prime (320544361) 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, 53424051 + ... + 53424056.

It is an arithmetic number, because the mean of its divisors is an integer number (106848108).

Almost surely, 2^320544321 is an apocalyptic number.

It is an amenable number.

320544321 is a deficient number, since it is larger than the sum of its proper divisors (106848111).

320544321 is a wasteful number, since it uses less digits than its factorization.

320544321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106848110.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 320544321 is about 17903.7515900998. The cubic root of 320544321 is about 684.3779822393.

Adding to 320544321 its reverse (123445023), we get a palindrome (443989344).

The spelling of 320544321 in words is "three hundred twenty million, five hundred forty-four thousand, three hundred twenty-one".