320320333331 has 4 divisors (see below), whose sum is σ = 320334715272. Its totient is φ = 320305951392.

The previous prime is 320320333321. The next prime is 320320333339. The reversal of 320320333331 is 133333023023.

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 320320333331 - 2¹⁸ = 320320071187 is a prime.

It is a super-2 number, since 2×320320333331² (a number of 24 digits) contains 22 as substring.

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 320320333331.

It is not an unprimeable number, because it can be changed into a prime (320320333339) 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, 7157510 + ... + 7202123.

It is an arithmetic number, because the mean of its divisors is an integer number (80083678818).

Almost surely, 2^320320333331 is an apocalyptic number.

320320333331 is a deficient number, since it is larger than the sum of its proper divisors (14381941).

320320333331 is a wasteful number, since it uses less digits than its factorization.

320320333331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14381940.

The product of its (nonzero) digits is 8748, while the sum is 26.

Adding to 320320333331 its reverse (133333023023), we get a palindrome (453653356354).

The spelling of 320320333331 in words is "three hundred twenty billion, three hundred twenty million, three hundred thirty-three thousand, three hundred thirty-one".