320424321 has 8 divisors (see below), whose sum is σ = 488265664. Its totient is φ = 183099600.

The previous prime is 320424317. The next prime is 320424337. The reversal of 320424321 is 123424023.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 320424321 - 2² = 320424317 is a prime.

It is a super-2 number, since 2×320424321² = 205343490976622082, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 15258301 = 320424321 / (3 + 2 + 0 + 4 + 2 + 4 + 3 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320424361) 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 7 ways as a sum of consecutive naturals, for example, 7629130 + ... + 7629171.

It is an arithmetic number, because the mean of its divisors is an integer number (61033208).

Almost surely, 2^320424321 is an apocalyptic number.

It is an amenable number.

320424321 is a deficient number, since it is larger than the sum of its proper divisors (167841343).

320424321 is a wasteful number, since it uses less digits than its factorization.

320424321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15258311.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 320424321 is about 17900.4000234632. The cubic root of 320424321 is about 684.2925696012.

Adding to 320424321 its reverse (123424023), we get a palindrome (443848344).

It can be divided in two parts, 32042 and 4321, that added together give a palindrome (36363).

The spelling of 320424321 in words is "three hundred twenty million, four hundred twenty-four thousand, three hundred twenty-one".