225115785 has 24 divisors (see below), whose sum is σ = 413155080. Its totient is φ = 112998912.

The previous prime is 225115753. The next prime is 225115811. The reversal of 225115785 is 587511522.

It can be written as a sum of positive squares in 4 ways, for example, as 27657081 + 197458704 = 5259^2 + 14052^2 .

It is not a de Polignac number, because 225115785 - 2⁵ = 225115753 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 146370 + ... + 147899.

It is an arithmetic number, because the mean of its divisors is an integer number (17214795).

Almost surely, 2^225115785 is an apocalyptic number.

It is an amenable number.

225115785 is a deficient number, since it is larger than the sum of its proper divisors (188039295).

225115785 is a wasteful number, since it uses less digits than its factorization.

225115785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294297 (or 294294 counting only the distinct ones).

The product of its digits is 28000, while the sum is 36.

The square root of 225115785 is about 15003.8590036030. The cubic root of 225115785 is about 608.3245117046.

The spelling of 225115785 in words is "two hundred twenty-five million, one hundred fifteen thousand, seven hundred eighty-five".