320320243 has 4 divisors (see below), whose sum is σ = 320502280. Its totient is φ = 320138208.

The previous prime is 320320237. The next prime is 320320261. The reversal of 320320243 is 342023023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342023023 = 443 ⋅772061.

It is a cyclic number.

It is not a de Polignac number, because 320320243 - 2⁹ = 320319731 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 320320243.

It is not an unprimeable number, because it can be changed into a prime (320320213) 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 3 ways as a sum of consecutive naturals, for example, 88353 + ... + 91906.

It is an arithmetic number, because the mean of its divisors is an integer number (80125570).

Almost surely, 2^320320243 is an apocalyptic number.

320320243 is a deficient number, since it is larger than the sum of its proper divisors (182037).

320320243 is a wasteful number, since it uses less digits than its factorization.

320320243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182036.

The product of its (nonzero) digits is 864, while the sum is 19.

The square root of 320320243 is about 17897.4926456194. The cubic root of 320320243 is about 684.2184725265.

Adding to 320320243 its reverse (342023023), we get a palindrome (662343266).

The spelling of 320320243 in words is "three hundred twenty million, three hundred twenty thousand, two hundred forty-three".