225018 has 24 divisors (see below), whose sum is σ = 506688. Its totient is φ = 74844.

The previous prime is 224993. The next prime is 225023. The reversal of 225018 is 810522.

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 255 + ... + 717.

It is an arithmetic number, because the mean of its divisors is an integer number (21112).

2²²⁵⁰¹⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 225018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (253344).

225018 is an abundant number, since it is smaller than the sum of its proper divisors (281670).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

225018 is an equidigital number, since it uses as much as digits as its factorization.

225018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480 (or 468 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 225018 is about 474.3606223118. The cubic root of 225018 is about 60.8236418330.

The spelling of 225018 in words is "two hundred twenty-five thousand, eighteen".