320203131311 has 16 divisors (see below), whose sum is σ = 376966275840. Its totient is φ = 266269744320.

The previous prime is 320203131251. The next prime is 320203131329. The reversal of 320203131311 is 113131302023.

It is a cyclic number.

It is not a de Polignac number, because 320203131311 - 2¹⁰ = 320203130287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320203131341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3065081 + ... + 3167826.

It is an arithmetic number, because the mean of its divisors is an integer number (23560392240).

Almost surely, 2^320203131311 is an apocalyptic number.

320203131311 is a deficient number, since it is larger than the sum of its proper divisors (56763144529).

320203131311 is a wasteful number, since it uses less digits than its factorization.

320203131311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6233134.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 320203131311 its reverse (113131302023), we get a palindrome (433334433334).

The spelling of 320203131311 in words is "three hundred twenty billion, two hundred three million, one hundred thirty-one thousand, three hundred eleven".