225394218 has 128 divisors (see below), whose sum is σ = 599808000. Its totient is φ = 62678448.

The previous prime is 225394217. The next prime is 225394229. The reversal of 225394218 is 812493522.

It is a happy number.

225394218 is a `hidden beast` number, since 225 + 3 + 9 + 421 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (225394217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 796305 + ... + 796587.

It is an arithmetic number, because the mean of its divisors is an integer number (4686000).

Almost surely, 2^225394218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 225394218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (299904000).

225394218 is an abundant number, since it is smaller than the sum of its proper divisors (374413782).

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

225394218 is a wasteful number, since it uses less digits than its factorization.

225394218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358 (or 338 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 225394218 is about 15013.1348491912. The cubic root of 225394218 is about 608.5752091187.

The spelling of 225394218 in words is "two hundred twenty-five million, three hundred ninety-four thousand, two hundred eighteen".