320020323331 has 4 divisors (see below), whose sum is σ = 320050095112. Its totient is φ = 319990551552.

The previous prime is 320020323313. The next prime is 320020323451. The reversal of 320020323331 is 133323020023.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320020323331 is a prime.

It is a super-2 number, since 2×320020323331² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320020323131) 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, 14869761 + ... + 14891266.

It is an arithmetic number, because the mean of its divisors is an integer number (80012523778).

Almost surely, 2^320020323331 is an apocalyptic number.

320020323331 is a deficient number, since it is larger than the sum of its proper divisors (29771781).

320020323331 is a wasteful number, since it uses less digits than its factorization.

320020323331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29771780.

The product of its (nonzero) digits is 1944, while the sum is 22.

Adding to 320020323331 its reverse (133323020023), we get a palindrome (453343343354).

The spelling of 320020323331 in words is "three hundred twenty billion, twenty million, three hundred twenty-three thousand, three hundred thirty-one".