320243313 has 8 divisors (see below), whose sum is σ = 459836608. Its totient is φ = 197072784.

The previous prime is 320243311. The next prime is 320243369. The reversal of 320243313 is 313342023.

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

It is not a de Polignac number, because 320243313 - 2¹ = 320243311 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 320243313.

It is not an unprimeable number, because it can be changed into a prime (320243311) 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 7 ways as a sum of consecutive naturals, for example, 4105645 + ... + 4105722.

It is an arithmetic number, because the mean of its divisors is an integer number (57479576).

Almost surely, 2^320243313 is an apocalyptic number.

It is an amenable number.

320243313 is a deficient number, since it is larger than the sum of its proper divisors (139593295).

320243313 is a wasteful number, since it uses less digits than its factorization.

320243313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8211383.

The product of its (nonzero) digits is 1296, while the sum is 21.

The square root of 320243313 is about 17895.3433328338. The cubic root of 320243313 is about 684.1636928254.

Adding to 320243313 its reverse (313342023), we get a palindrome (633585336).

The spelling of 320243313 in words is "three hundred twenty million, two hundred forty-three thousand, three hundred thirteen".