225818136 has 48 divisors (see below), whose sum is σ = 631325760. Its totient is φ = 72843840.

The previous prime is 225818129. The next prime is 225818147. The reversal of 225818136 is 631818522.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 225818136.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48355 + ... + 52818.

It is an arithmetic number, because the mean of its divisors is an integer number (13152620).

Almost surely, 2^225818136 is an apocalyptic number.

It is an amenable number.

225818136 is an abundant number, since it is smaller than the sum of its proper divisors (405507624).

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

225818136 is a wasteful number, since it uses less digits than its factorization.

225818136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101216 (or 101209 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 225818136 is about 15027.2464543575. The cubic root of 225818136 is about 608.9565031582.

225818136 divided by its sum of digits (36) gives a palindrome (6272726).

The spelling of 225818136 in words is "two hundred twenty-five million, eight hundred eighteen thousand, one hundred thirty-six".