243441322081 has 2 divisors, whose sum is σ = 243441322082. Its totient is φ = 243441322080.

The previous prime is 243441322049. The next prime is 243441322133. The reversal of 243441322081 is 180223144342.

243441322081 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., 235039766481 + 8401555600 = 484809^2 + 91660^2 .

It is a cyclic number.

It is not a de Polignac number, because 243441322081 - 2⁵ = 243441322049 is a prime.

It is a super-2 number, since 2×243441322081² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (243441322381) 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, 121720661040 + 121720661041.

It is an arithmetic number, because the mean of its divisors is an integer number (121720661041).

Almost surely, 2^243441322081 is an apocalyptic number.

It is an amenable number.

243441322081 is a deficient number, since it is larger than the sum of its proper divisors (1).

243441322081 is an equidigital number, since it uses as much as digits as its factorization.

243441322081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36864, while the sum is 34.

The spelling of 243441322081 in words is "two hundred forty-three billion, four hundred forty-one million, three hundred twenty-two thousand, eighty-one".