231320333 has 2 divisors, whose sum is σ = 231320334. Its totient is φ = 231320332.

The previous prime is 231320329. The next prime is 231320339. The reversal of 231320333 is 333023132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 216590089 + 14730244 = 14717^2 + 3838^2 .

It is a cyclic number.

It is not a de Polignac number, because 231320333 - 2² = 231320329 is a prime.

It is equal to p_12711251 and since 231320333 and 12711251 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231320339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115660166 + 115660167.

It is an arithmetic number, because the mean of its divisors is an integer number (115660167).

Almost surely, 2^231320333 is an apocalyptic number.

It is an amenable number.

231320333 is a deficient number, since it is larger than the sum of its proper divisors (1).

231320333 is an equidigital number, since it uses as much as digits as its factorization.

231320333 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 20.

The square root of 231320333 is about 15209.2186847320. The cubic root of 231320333 is about 613.8627344374.

Adding to 231320333 its reverse (333023132), we get a palindrome (564343465).

The spelling of 231320333 in words is "two hundred thirty-one million, three hundred twenty thousand, three hundred thirty-three".