225218 has 8 divisors (see below), whose sum is σ = 386112. Its totient is φ = 96516.

The previous prime is 225217. The next prime is 225221. The reversal of 225218 is 812522.

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

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 225218.

It is not an unprimeable number, because it can be changed into a prime (225217) 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, 8030 + ... + 8057.

It is an arithmetic number, because the mean of its divisors is an integer number (48264).

2²²⁵²¹⁸ is an apocalyptic number.

225218 is a deficient number, since it is larger than the sum of its proper divisors (160894).

225218 is a wasteful number, since it uses less digits than its factorization.

225218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16096.

The product of its digits is 320, while the sum is 20.

The square root of 225218 is about 474.5713855681. The cubic root of 225218 is about 60.8416568749.

The spelling of 225218 in words is "two hundred twenty-five thousand, two hundred eighteen".