320042543323 has 4 divisors (see below), whose sum is σ = 320045949568. Its totient is φ = 320039137080.

The previous prime is 320042543321. The next prime is 320042543329. The reversal of 320042543323 is 323345240023.

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 320042543323 - 2¹ = 320042543321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320042543321) 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, 1558068 + ... + 1751473.

It is an arithmetic number, because the mean of its divisors is an integer number (80011487392).

Almost surely, 2^320042543323 is an apocalyptic number.

320042543323 is a deficient number, since it is larger than the sum of its proper divisors (3406245).

320042543323 is an equidigital number, since it uses as much as digits as its factorization.

320042543323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3406244.

The product of its (nonzero) digits is 51840, while the sum is 31.

Adding to 320042543323 its reverse (323345240023), we get a palindrome (643387783346).

The spelling of 320042543323 in words is "three hundred twenty billion, forty-two million, five hundred forty-three thousand, three hundred twenty-three".