225804815 has 8 divisors (see below), whose sum is σ = 272251248. Its totient is φ = 179786880.

The previous prime is 225804811. The next prime is 225804827. The reversal of 225804815 is 518408522.

It is a happy number.

225804815 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 225804815 - 2² = 225804811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225804811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105962 + ... + 108071.

It is an arithmetic number, because the mean of its divisors is an integer number (34031406).

Almost surely, 2^225804815 is an apocalyptic number.

225804815 is a deficient number, since it is larger than the sum of its proper divisors (46446433).

225804815 is a wasteful number, since it uses less digits than its factorization.

225804815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214249.

The product of its (nonzero) digits is 25600, while the sum is 35.

The square root of 225804815 is about 15026.8032195807. The cubic root of 225804815 is about 608.9445288187.

The spelling of 225804815 in words is "two hundred twenty-five million, eight hundred four thousand, eight hundred fifteen".