320243433443 has 4 divisors (see below), whose sum is σ = 334167061008. Its totient is φ = 306319805880.

The previous prime is 320243433439. The next prime is 320243433457. The reversal of 320243433443 is 344334342023.

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 320243433443 - 2² = 320243433439 is a prime.

It is a super-2 number, since 2×320243433443² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320243433473) 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, 6961813748 + ... + 6961813793.

It is an arithmetic number, because the mean of its divisors is an integer number (83541765252).

Almost surely, 2^320243433443 is an apocalyptic number.

320243433443 is a deficient number, since it is larger than the sum of its proper divisors (13923627565).

320243433443 is a wasteful number, since it uses less digits than its factorization.

320243433443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13923627564.

The product of its (nonzero) digits is 248832, while the sum is 35.

Adding to 320243433443 its reverse (344334342023), we get a palindrome (664577775466).

The spelling of 320243433443 in words is "three hundred twenty billion, two hundred forty-three million, four hundred thirty-three thousand, four hundred forty-three".