218214071 has 2 divisors, whose sum is σ = 218214072. Its totient is φ = 218214070.

The previous prime is 218213999. The next prime is 218214079. The reversal of 218214071 is 170412812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 218214071 - 2¹⁸ = 217951927 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 218214071.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (218214079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109107035 + 109107036.

It is an arithmetic number, because the mean of its divisors is an integer number (109107036).

Almost surely, 2^218214071 is an apocalyptic number.

218214071 is a deficient number, since it is larger than the sum of its proper divisors (1).

218214071 is an equidigital number, since it uses as much as digits as its factorization.

218214071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 26.

The square root of 218214071 is about 14772.0706402319. The cubic root of 218214071 is about 602.0431007430.

Adding to 218214071 its reverse (170412812), we get a palindrome (388626883).

The spelling of 218214071 in words is "two hundred eighteen million, two hundred fourteen thousand, seventy-one".