218143 has 2 divisors, whose sum is σ = 218144. Its totient is φ = 218142.

The previous prime is 218137. The next prime is 218149. The reversal of 218143 is 341812.

It is a balanced prime because it is at equal distance from previous prime (218137) and next prime (218149).

It is a cyclic number.

It is not a de Polignac number, because 218143 - 2⁵ = 218111 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 218143.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (218149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109071 + 109072.

It is an arithmetic number, because the mean of its divisors is an integer number (109072).

2²¹⁸¹⁴³ is an apocalyptic number.

218143 is a deficient number, since it is larger than the sum of its proper divisors (1).

218143 is an equidigital number, since it uses as much as digits as its factorization.

218143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192, while the sum is 19.

The square root of 218143 is about 467.0578122674. The cubic root of 218143 is about 60.1977733050.

Adding to 218143 its reverse (341812), we get a palindrome (559955).

It can be divided in two parts, 218 and 143, that added together give a square (361 = 19²).

The spelling of 218143 in words is "two hundred eighteen thousand, one hundred forty-three".