243031122289 has 2 divisors, whose sum is σ = 243031122290. Its totient is φ = 243031122288.

The previous prime is 243031122247. The next prime is 243031122349. The reversal of 243031122289 is 982221130342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131986890000 + 111044232289 = 363300^2 + 333233^2 .

It is a cyclic number.

It is not a de Polignac number, because 243031122289 - 2³⁷ = 105592168817 is a prime.

It is not a weakly prime, because it can be changed into another prime (243031122589) 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, 121515561144 + 121515561145.

It is an arithmetic number, because the mean of its divisors is an integer number (121515561145).

Almost surely, 2^243031122289 is an apocalyptic number.

It is an amenable number.

243031122289 is a deficient number, since it is larger than the sum of its proper divisors (1).

243031122289 is an equidigital number, since it uses as much as digits as its factorization.

243031122289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 37.

The spelling of 243031122289 in words is "two hundred forty-three billion, thirty-one million, one hundred twenty-two thousand, two hundred eighty-nine".