218066143 has 2 divisors, whose sum is σ = 218066144. Its totient is φ = 218066142.

The previous prime is 218066081. The next prime is 218066153. The reversal of 218066143 is 341660812.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 218066143 - 2¹⁷ = 217935071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (218066153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109033071 + 109033072.

It is an arithmetic number, because the mean of its divisors is an integer number (109033072).

Almost surely, 2^218066143 is an apocalyptic number.

218066143 is a deficient number, since it is larger than the sum of its proper divisors (1).

218066143 is an equidigital number, since it uses as much as digits as its factorization.

218066143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 218066143 is about 14767.0627749732. The cubic root of 218066143 is about 601.9070276910.

The spelling of 218066143 in words is "two hundred eighteen million, sixty-six thousand, one hundred forty-three".