243232320091 has 2 divisors, whose sum is σ = 243232320092. Its totient is φ = 243232320090.

The previous prime is 243232320073. The next prime is 243232320101. The reversal of 243232320091 is 190023232342.

243232320091 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 243232320091 - 2⁵ = 243232320059 is a prime.

It is not a weakly prime, because it can be changed into another prime (243232320011) 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, 121616160045 + 121616160046.

It is an arithmetic number, because the mean of its divisors is an integer number (121616160046).

Almost surely, 2^243232320091 is an apocalyptic number.

243232320091 is a deficient number, since it is larger than the sum of its proper divisors (1).

243232320091 is an equidigital number, since it uses as much as digits as its factorization.

243232320091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 31.

The spelling of 243232320091 in words is "two hundred forty-three billion, two hundred thirty-two million, three hundred twenty thousand, ninety-one".