320331020031331 has 4 divisors (see below), whose sum is σ = 320331228784000. Its totient is φ = 320330811278664.

The previous prime is 320331020031307. The next prime is 320331020031367. The reversal of 320331020031331 is 133130020133023.

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 320331020031331 - 2¹¹ = 320331020029283 is a prime.

It is a super-2 number, since 2×320331020031331² (a number of 30 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 = 320331020031296 and 320331020031305.

It is not an unprimeable number, because it can be changed into a prime (320331020031131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102057411 + ... + 105149308.

It is an arithmetic number, because the mean of its divisors is an integer number (80082807196000).

Almost surely, 2^{320331020031331} is an apocalyptic number.

320331020031331 is a deficient number, since it is larger than the sum of its proper divisors (208752669).

320331020031331 is a wasteful number, since it uses less digits than its factorization.

320331020031331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208752668.

The product of its (nonzero) digits is 2916, while the sum is 25.

Adding to 320331020031331 its reverse (133130020133023), we get a palindrome (453461040164354).

The spelling of 320331020031331 in words is "three hundred twenty trillion, three hundred thirty-one billion, twenty million, thirty-one thousand, three hundred thirty-one".