231442333 has 2 divisors, whose sum is σ = 231442334. Its totient is φ = 231442332.

The previous prime is 231442303. The next prime is 231442349. The reversal of 231442333 is 333244132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 229431609 + 2010724 = 15147^2 + 1418^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231442333 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231442298 and 231442307.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231442303) 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 as a sum of consecutive naturals, namely, 115721166 + 115721167.

It is an arithmetic number, because the mean of its divisors is an integer number (115721167).

Almost surely, 2^231442333 is an apocalyptic number.

It is an amenable number.

231442333 is a deficient number, since it is larger than the sum of its proper divisors (1).

231442333 is an equidigital number, since it uses as much as digits as its factorization.

231442333 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 25.

The square root of 231442333 is about 15213.2288814702. The cubic root of 231442333 is about 613.9706340046.

Adding to 231442333 its reverse (333244132), we get a palindrome (564686465).

The spelling of 231442333 in words is "two hundred thirty-one million, four hundred forty-two thousand, three hundred thirty-three".