217798383223 has 2 divisors, whose sum is σ = 217798383224. Its totient is φ = 217798383222.

The previous prime is 217798383199. The next prime is 217798383259. The reversal of 217798383223 is 322383897712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 217798383223 - 2¹³ = 217798375031 is a prime.

It is a super-2 number, since 2×217798383223² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (217798383923) 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, 108899191611 + 108899191612.

It is an arithmetic number, because the mean of its divisors is an integer number (108899191612).

Almost surely, 2^217798383223 is an apocalyptic number.

217798383223 is a deficient number, since it is larger than the sum of its proper divisors (1).

217798383223 is an equidigital number, since it uses as much as digits as its factorization.

217798383223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6096384, while the sum is 55.

The spelling of 217798383223 in words is "two hundred seventeen billion, seven hundred ninety-eight million, three hundred eighty-three thousand, two hundred twenty-three".