218087 has 2 divisors, whose sum is σ = 218088. Its totient is φ = 218086.

The previous prime is 218083. The next prime is 218107. The reversal of 218087 is 780812.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 218087 - 2² = 218083 is a prime.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 218087.

It is not a weakly prime, because it can be changed into another prime (218081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109043 + 109044.

It is an arithmetic number, because the mean of its divisors is an integer number (109044).

2²¹⁸⁰⁸⁷ is an apocalyptic number.

218087 is a deficient number, since it is larger than the sum of its proper divisors (1).

218087 is an equidigital number, since it uses as much as digits as its factorization.

218087 is an evil number, because the sum of its binary digits is even.

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

The square root of 218087 is about 466.9978586675. The cubic root of 218087 is about 60.1926216937.

Adding to 218087 its reverse (780812), we get a palindrome (998899).

The spelling of 218087 in words is "two hundred eighteen thousand, eighty-seven".