320021313233 has 4 divisors (see below), whose sum is σ = 320023578420. Its totient is φ = 320019048048.

The previous prime is 320021313191. The next prime is 320021313317. The reversal of 320021313233 is 332313120023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 332313120023 = 113 ⋅2940824071.

It can be written as a sum of positive squares in 2 ways, for example, as 137276178064 + 182745135169 = 370508^2 + 427487^2 .

It is a cyclic number.

It is not a de Polignac number, because 320021313233 - 2²² = 320017118929 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 320021313199 and 320021313208.

It is not an unprimeable number, because it can be changed into a prime (320021313433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 905498 + ... + 1208291.

It is an arithmetic number, because the mean of its divisors is an integer number (80005894605).

Almost surely, 2^320021313233 is an apocalyptic number.

It is an amenable number.

320021313233 is a deficient number, since it is larger than the sum of its proper divisors (2265187).

320021313233 is a wasteful number, since it uses less digits than its factorization.

320021313233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2265186.

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

Adding to 320021313233 its reverse (332313120023), we get a palindrome (652334433256).

The spelling of 320021313233 in words is "three hundred twenty billion, twenty-one million, three hundred thirteen thousand, two hundred thirty-three".