320323230505 has 16 divisors (see below), whose sum is σ = 406854302400. Its totient is φ = 241429999680.

The previous prime is 320323230499. The next prime is 320323230527. The reversal of 320323230505 is 505032323023.

It is not a de Polignac number, because 320323230505 - 2³ = 320323230497 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9297235 + ... + 9331624.

It is an arithmetic number, because the mean of its divisors is an integer number (25428393900).

Almost surely, 2^320323230505 is an apocalyptic number.

It is an amenable number.

320323230505 is a deficient number, since it is larger than the sum of its proper divisors (86531071895).

320323230505 is a wasteful number, since it uses less digits than its factorization.

320323230505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18629064.

The product of its (nonzero) digits is 16200, while the sum is 28.

Adding to 320323230505 its reverse (505032323023), we get a palindrome (825355553528).

The spelling of 320323230505 in words is "three hundred twenty billion, three hundred twenty-three million, two hundred thirty thousand, five hundred five".