218029 has 4 divisors (see below), whose sum is σ = 249184. Its totient is φ = 186876.

The previous prime is 218021. The next prime is 218047. The reversal of 218029 is 920812.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 218029 - 2³ = 218021 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a congruent number.

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

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 in 3 ways as a sum of consecutive naturals, for example, 15567 + ... + 15580.

It is an arithmetic number, because the mean of its divisors is an integer number (62296).

2²¹⁸⁰²⁹ is an apocalyptic number.

It is an amenable number.

218029 is a deficient number, since it is larger than the sum of its proper divisors (31155).

218029 is an equidigital number, since it uses as much as digits as its factorization.

218029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31154.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 218029 is about 466.9357557523. The cubic root of 218029 is about 60.1872851666.

It can be divided in two parts, 2180 and 29, that added together give a square (2209 = 47²).

The spelling of 218029 in words is "two hundred eighteen thousand, twenty-nine".