218164163 has 4 divisors (see below), whose sum is σ = 249330480. Its totient is φ = 186997848.

The previous prime is 218164153. The next prime is 218164181. The reversal of 218164163 is 361461812.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 218164163 - 2¹⁸ = 217902019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (218164103) 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 3 ways as a sum of consecutive naturals, for example, 15583148 + ... + 15583161.

It is an arithmetic number, because the mean of its divisors is an integer number (62332620).

Almost surely, 2^218164163 is an apocalyptic number.

218164163 is a deficient number, since it is larger than the sum of its proper divisors (31166317).

218164163 is an equidigital number, since it uses as much as digits as its factorization.

218164163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31166316.

The product of its digits is 6912, while the sum is 32.

The square root of 218164163 is about 14770.3812746997. The cubic root of 218164163 is about 601.9971992453.

The spelling of 218164163 in words is "two hundred eighteen million, one hundred sixty-four thousand, one hundred sixty-three".