231311320333 has 8 divisors (see below), whose sum is σ = 238554364928. Its totient is φ = 224152989984.

The previous prime is 231311320319. The next prime is 231311320417. The reversal of 231311320333 is 333023113132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231311320333 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231311320298 and 231311320307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231311320313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21173016 + ... + 21183937.

It is an arithmetic number, because the mean of its divisors is an integer number (29819295616).

Almost surely, 2^231311320333 is an apocalyptic number.

It is an amenable number.

231311320333 is a deficient number, since it is larger than the sum of its proper divisors (7243044595).

231311320333 is a wasteful number, since it uses less digits than its factorization.

231311320333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42357123.

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

Adding to 231311320333 its reverse (333023113132), we get a palindrome (564334433465).

The spelling of 231311320333 in words is "two hundred thirty-one billion, three hundred eleven million, three hundred twenty thousand, three hundred thirty-three".