217238780743 has 2 divisors, whose sum is σ = 217238780744. Its totient is φ = 217238780742.

The previous prime is 217238780711. The next prime is 217238780771. The reversal of 217238780743 is 347087832712.

217238780743 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 217238780743 - 2⁵ = 217238780711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (217238780543) 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, 108619390371 + 108619390372.

It is an arithmetic number, because the mean of its divisors is an integer number (108619390372).

Almost surely, 2^217238780743 is an apocalyptic number.

217238780743 is a deficient number, since it is larger than the sum of its proper divisors (1).

217238780743 is an equidigital number, since it uses as much as digits as its factorization.

217238780743 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3161088, while the sum is 52.

The spelling of 217238780743 in words is "two hundred seventeen billion, two hundred thirty-eight million, seven hundred eighty thousand, seven hundred forty-three".