320221243 has 4 divisors (see below), whose sum is σ = 320275368. Its totient is φ = 320167120.

The previous prime is 320221217. The next prime is 320221303. The reversal of 320221243 is 342122023.

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 320221243 - 2⁵ = 320221211 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 320221243.

It is not an unprimeable number, because it can be changed into a prime (320221543) 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, 16921 + ... + 30442.

It is an arithmetic number, because the mean of its divisors is an integer number (80068842).

Almost surely, 2^320221243 is an apocalyptic number.

320221243 is a deficient number, since it is larger than the sum of its proper divisors (54125).

320221243 is an equidigital number, since it uses as much as digits as its factorization.

320221243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54124.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 320221243 is about 17894.7266813439. The cubic root of 320221243 is about 684.1479757764.

Adding to 320221243 its reverse (342122023), we get a palindrome (662343266).

The spelling of 320221243 in words is "three hundred twenty million, two hundred twenty-one thousand, two hundred forty-three".