225385818 has 32 divisors (see below), whose sum is σ = 516082560. Its totient is φ = 64281600.

The previous prime is 225385807. The next prime is 225385837. The reversal of 225385818 is 818583522.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 225385818.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 20778 + ... + 29706.

It is an arithmetic number, because the mean of its divisors is an integer number (16127580).

Almost surely, 2^225385818 is an apocalyptic number.

225385818 is an abundant number, since it is smaller than the sum of its proper divisors (290696742).

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

225385818 is a wasteful number, since it uses less digits than its factorization.

225385818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9542.

The product of its digits is 153600, while the sum is 42.

The square root of 225385818 is about 15012.8550915540. The cubic root of 225385818 is about 608.5676488904.

The spelling of 225385818 in words is "two hundred twenty-five million, three hundred eighty-five thousand, eight hundred eighteen".