218215 has 8 divisors (see below), whose sum is σ = 275760. Its totient is φ = 165312.

The previous prime is 218213. The next prime is 218227. The reversal of 218215 is 512812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 218215 - 2¹ = 218213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 218192 and 218201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1054 + ... + 1243.

It is an arithmetic number, because the mean of its divisors is an integer number (34470).

2²¹⁸²¹⁵ is an apocalyptic number.

218215 is a deficient number, since it is larger than the sum of its proper divisors (57545).

218215 is a wasteful number, since it uses less digits than its factorization.

218215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2321.

The product of its digits is 160, while the sum is 19.

The square root of 218215 is about 467.1348841609. The cubic root of 218215 is about 60.2043955099.

It can be divided in two parts, 2182 and 15, that added together give a cube (2197 = 13³).

The spelling of 218215 in words is "two hundred eighteen thousand, two hundred fifteen".