320320231331 has 4 divisors (see below), whose sum is σ = 320349953664. Its totient is φ = 320290509000.

The previous prime is 320320231307. The next prime is 320320231381. The reversal of 320320231331 is 133132023023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133132023023 = 769 ⋅173123567.

It is a cyclic number.

It is not a de Polignac number, because 320320231331 - 2¹⁴ = 320320214947 is a prime.

It is a super-2 number, since 2×320320231331² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320320231297 and 320320231306.

It is not an unprimeable number, because it can be changed into a prime (320320231381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14844995 + ... + 14866556.

It is an arithmetic number, because the mean of its divisors is an integer number (80087488416).

Almost surely, 2^320320231331 is an apocalyptic number.

320320231331 is a deficient number, since it is larger than the sum of its proper divisors (29722333).

320320231331 is a wasteful number, since it uses less digits than its factorization.

320320231331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29722332.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 320320231331 its reverse (133132023023), we get a palindrome (453452254354).

The spelling of 320320231331 in words is "three hundred twenty billion, three hundred twenty million, two hundred thirty-one thousand, three hundred thirty-one".