243241143491 has 2 divisors, whose sum is σ = 243241143492. Its totient is φ = 243241143490.

The previous prime is 243241143449. The next prime is 243241143533. The reversal of 243241143491 is 194341142342.

It is a balanced prime because it is at equal distance from previous prime (243241143449) and next prime (243241143533).

It is a cyclic number.

It is not a de Polignac number, because 243241143491 - 2²⁶ = 243174034627 is a prime.

It is not a weakly prime, because it can be changed into another prime (243241143791) 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, 121620571745 + 121620571746.

It is an arithmetic number, because the mean of its divisors is an integer number (121620571746).

Almost surely, 2^243241143491 is an apocalyptic number.

243241143491 is a deficient number, since it is larger than the sum of its proper divisors (1).

243241143491 is an equidigital number, since it uses as much as digits as its factorization.

243241143491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 38.

The spelling of 243241143491 in words is "two hundred forty-three billion, two hundred forty-one million, one hundred forty-three thousand, four hundred ninety-one".