231312320333 has 2 divisors, whose sum is σ = 231312320334. Its totient is φ = 231312320332.

The previous prime is 231312320329. The next prime is 231312320339. The reversal of 231312320333 is 333023213132.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 225432191209 + 5880129124 = 474797^2 + 76682^2 .

It is a cyclic number.

It is not a de Polignac number, because 231312320333 - 2² = 231312320329 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231312320339) 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 as a sum of consecutive naturals, namely, 115656160166 + 115656160167.

It is an arithmetic number, because the mean of its divisors is an integer number (115656160167).

Almost surely, 2^231312320333 is an apocalyptic number.

It is an amenable number.

231312320333 is a deficient number, since it is larger than the sum of its proper divisors (1).

231312320333 is an equidigital number, since it uses as much as digits as its factorization.

231312320333 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 26.

Adding to 231312320333 its reverse (333023213132), we get a palindrome (564335533465).

The spelling of 231312320333 in words is "two hundred thirty-one billion, three hundred twelve million, three hundred twenty thousand, three hundred thirty-three".