225855820 has 12 divisors (see below), whose sum is σ = 474297264. Its totient is φ = 90342320.

The previous prime is 225855809. The next prime is 225855841. The reversal of 225855820 is 28558522.

225855820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 225855820.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5646376 + ... + 5646415.

It is an arithmetic number, because the mean of its divisors is an integer number (39524772).

Almost surely, 2^225855820 is an apocalyptic number.

225855820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225855820 is an abundant number, since it is smaller than the sum of its proper divisors (248441444).

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

225855820 is a wasteful number, since it uses less digits than its factorization.

225855820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11292800 (or 11292798 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 37.

The square root of 225855820 is about 15028.5002578434. The cubic root of 225855820 is about 608.9903750176.

The spelling of 225855820 in words is "two hundred twenty-five million, eight hundred fifty-five thousand, eight hundred twenty".