218298193 has 2 divisors, whose sum is σ = 218298194. Its totient is φ = 218298192.

The previous prime is 218298191. The next prime is 218298203. The reversal of 218298193 is 391892812.

218298193 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 198021184 + 20277009 = 14072^2 + 4503^2 .

It is a cyclic number.

It is not a de Polignac number, because 218298193 - 2¹ = 218298191 is a prime.

Together with 218298191, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (218298191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109149096 + 109149097.

It is an arithmetic number, because the mean of its divisors is an integer number (109149097).

Almost surely, 2^218298193 is an apocalyptic number.

It is an amenable number.

218298193 is a deficient number, since it is larger than the sum of its proper divisors (1).

218298193 is an equidigital number, since it uses as much as digits as its factorization.

218298193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 43.

The square root of 218298193 is about 14774.9176985863. The cubic root of 218298193 is about 602.1204537798.

The spelling of 218298193 in words is "two hundred eighteen million, two hundred ninety-eight thousand, one hundred ninety-three".