243445123331 has 2 divisors, whose sum is σ = 243445123332. Its totient is φ = 243445123330.

The previous prime is 243445123277. The next prime is 243445123333. The reversal of 243445123331 is 133321544342.

243445123331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243445123331 - 2³⁰ = 242371381507 is a prime.

It is a super-2 number, since 2×243445123331² (a number of 24 digits) contains 22 as substring.

Together with 243445123333, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 243445123291 and 243445123300.

It is not a weakly prime, because it can be changed into another prime (243445123333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121722561665 + 121722561666.

It is an arithmetic number, because the mean of its divisors is an integer number (121722561666).

Almost surely, 2^243445123331 is an apocalyptic number.

243445123331 is a deficient number, since it is larger than the sum of its proper divisors (1).

243445123331 is an equidigital number, since it uses as much as digits as its factorization.

243445123331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 35.

Adding to 243445123331 its reverse (133321544342), we get a palindrome (376766667673).

The spelling of 243445123331 in words is "two hundred forty-three billion, four hundred forty-five million, one hundred twenty-three thousand, three hundred thirty-one".