243115146191 has 2 divisors, whose sum is σ = 243115146192. Its totient is φ = 243115146190.

The previous prime is 243115146163. The next prime is 243115146193. The reversal of 243115146191 is 191641511342.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243115146191 - 2²² = 243110951887 is a prime.

Together with 243115146193, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243115146193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121557573095 + 121557573096.

It is an arithmetic number, because the mean of its divisors is an integer number (121557573096).

Almost surely, 2^243115146191 is an apocalyptic number.

243115146191 is a deficient number, since it is larger than the sum of its proper divisors (1).

243115146191 is an equidigital number, since it uses as much as digits as its factorization.

243115146191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 38.

The spelling of 243115146191 in words is "two hundred forty-three billion, one hundred fifteen million, one hundred forty-six thousand, one hundred ninety-one".