218098 has 4 divisors (see below), whose sum is σ = 327150. Its totient is φ = 109048.

The previous prime is 218087. The next prime is 218107. The reversal of 218098 is 890812.

218098 is nontrivially palindromic in base 12.

218098 is an esthetic number in base 5, because in such base its adjacent digits differ by 1.

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

It can be written as a sum of positive squares in only one way, i.e., 218089 + 9 = 467^2 + 3^2 .

It is an unprimeable number.

218098 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54523 + ... + 54526.

2²¹⁸⁰⁹⁸ is an apocalyptic number.

218098 is a deficient number, since it is larger than the sum of its proper divisors (109052).

218098 is a wasteful number, since it uses less digits than its factorization.

218098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109051.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 218098 is about 467.0096358749. The cubic root of 218098 is about 60.1936336869.

It can be divided in two parts, 2180 and 98, that added together give a triangular number (2278 = T₆₇).

The spelling of 218098 in words is "two hundred eighteen thousand, ninety-eight".