243155041289 has 2 divisors, whose sum is σ = 243155041290. Its totient is φ = 243155041288.

The previous prime is 243155041277. The next prime is 243155041361. The reversal of 243155041289 is 982140551342.

243155041289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 176698326025 + 66456715264 = 420355^2 + 257792^2 .

It is a cyclic number.

It is not a de Polignac number, because 243155041289 - 2¹² = 243155037193 is a prime.

It is not a weakly prime, because it can be changed into another prime (243155041249) 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, 121577520644 + 121577520645.

It is an arithmetic number, because the mean of its divisors is an integer number (121577520645).

Almost surely, 2^243155041289 is an apocalyptic number.

It is an amenable number.

243155041289 is a deficient number, since it is larger than the sum of its proper divisors (1).

243155041289 is an equidigital number, since it uses as much as digits as its factorization.

243155041289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 345600, while the sum is 44.

The spelling of 243155041289 in words is "two hundred forty-three billion, one hundred fifty-five million, forty-one thousand, two hundred eighty-nine".