225815178 has 8 divisors (see below), whose sum is σ = 451630368. Its totient is φ = 75271724.

The previous prime is 225815153. The next prime is 225815179. The reversal of 225815178 is 871518522.

225815178 is digitally balanced in base 3, 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.

225815178 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (225815179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18817926 + ... + 18817937.

It is an arithmetic number, because the mean of its divisors is an integer number (56453796).

Almost surely, 2^225815178 is an apocalyptic number.

225815178 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

225815178 is a wasteful number, since it uses less digits than its factorization.

225815178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37635868.

The product of its digits is 44800, while the sum is 39.

The square root of 225815178 is about 15027.1480328105. The cubic root of 225815178 is about 608.9538442321.

The spelling of 225815178 in words is "two hundred twenty-five million, eight hundred fifteen thousand, one hundred seventy-eight".