218026 has 4 divisors (see below), whose sum is σ = 327042. Its totient is φ = 109012.

The previous prime is 218021. The next prime is 218047. The reversal of 218026 is 620812.

It is a happy number.

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., 156025 + 62001 = 395^2 + 249^2 .

It is a junction number, because it is equal to n+sod(n) for n = 217994 and 218012.

It is not an unprimeable number, because it can be changed into a prime (218021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54505 + ... + 54508.

2²¹⁸⁰²⁶ is an apocalyptic number.

218026 is a deficient number, since it is larger than the sum of its proper divisors (109016).

218026 is a wasteful number, since it uses less digits than its factorization.

218026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109015.

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

The square root of 218026 is about 466.9325433079. The cubic root of 218026 is about 60.1870091135.

Adding to 218026 its reverse (620812), we get a palindrome (838838).

The spelling of 218026 in words is "two hundred eighteen thousand, twenty-six".