231331442233 has 2 divisors, whose sum is σ = 231331442234. Its totient is φ = 231331442232.

The previous prime is 231331442227. The next prime is 231331442257. The reversal of 231331442233 is 332244133132.

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., 205510808889 + 25820633344 = 453333^2 + 160688^2 .

It is a cyclic number.

It is not a de Polignac number, because 231331442233 - 2⁹ = 231331441721 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231331442195 and 231331442204.

It is not a weakly prime, because it can be changed into another prime (231331442203) 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, 115665721116 + 115665721117.

It is an arithmetic number, because the mean of its divisors is an integer number (115665721117).

Almost surely, 2^231331442233 is an apocalyptic number.

It is an amenable number.

231331442233 is a deficient number, since it is larger than the sum of its proper divisors (1).

231331442233 is an equidigital number, since it uses as much as digits as its factorization.

231331442233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 31.

Adding to 231331442233 its reverse (332244133132), we get a palindrome (563575575365).

The spelling of 231331442233 in words is "two hundred thirty-one billion, three hundred thirty-one million, four hundred forty-two thousand, two hundred thirty-three".