218420163 has 36 divisors (see below), whose sum is σ = 344117592. Its totient is φ = 133436160.

The previous prime is 218420159. The next prime is 218420197. The reversal of 218420163 is 361024812.

It is not a de Polignac number, because 218420163 - 2² = 218420159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (218420113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 247483 + ... + 248363.

It is an arithmetic number, because the mean of its divisors is an integer number (9558822).

Almost surely, 2^218420163 is an apocalyptic number.

218420163 is a deficient number, since it is larger than the sum of its proper divisors (125697429).

218420163 is a wasteful number, since it uses less digits than its factorization.

218420163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1076 (or 1060 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 218420163 is about 14779.0447255565. The cubic root of 218420163 is about 602.2325740515.

Adding to 218420163 its reverse (361024812), we get a palindrome (579444975).

The spelling of 218420163 in words is "two hundred eighteen million, four hundred twenty thousand, one hundred sixty-three".