225818900 has 36 divisors (see below), whose sum is σ = 490989408. Its totient is φ = 90150240.

The previous prime is 225818891. The next prime is 225818917. The reversal of 225818900 is 9818522.

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, 56777 + ... + 60623.

Almost surely, 2^225818900 is an apocalyptic number.

225818900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225818900 is an abundant number, since it is smaller than the sum of its proper divisors (265170508).

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

225818900 is a wasteful number, since it uses less digits than its factorization.

225818900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4448 (or 4441 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 225818900 is about 15027.2718748281. The cubic root of 225818900 is about 608.9571899088.

The spelling of 225818900 in words is "two hundred twenty-five million, eight hundred eighteen thousand, nine hundred".