320043443 has 4 divisors (see below), whose sum is σ = 322163088. Its totient is φ = 317923800.

The previous prime is 320043433. The next prime is 320043463. The reversal of 320043443 is 344340023.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 344340023 = 569 ⋅605167.

It is a cyclic number.

It is not a de Polignac number, because 320043443 - 2²⁶ = 252934579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320043403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1059596 + ... + 1059897.

It is an arithmetic number, because the mean of its divisors is an integer number (80540772).

Almost surely, 2^320043443 is an apocalyptic number.

320043443 is a deficient number, since it is larger than the sum of its proper divisors (2119645).

320043443 is a wasteful number, since it uses less digits than its factorization.

320043443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2119644.

The product of its (nonzero) digits is 3456, while the sum is 23.

The square root of 320043443 is about 17889.7580475534. The cubic root of 320043443 is about 684.0213299722.

Adding to 320043443 its reverse (344340023), we get a palindrome (664383466).

The spelling of 320043443 in words is "three hundred twenty million, forty-three thousand, four hundred forty-three".