225512305 has 4 divisors (see below), whose sum is σ = 270614772. Its totient is φ = 180409840.

The previous prime is 225512269. The next prime is 225512333. The reversal of 225512305 is 503215522.

It is a happy number.

225512305 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 177528976 + 47983329 = 13324^2 + 6927^2 .

It is a de Polignac number, because none of the positive numbers 2^k-225512305 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 225512305.

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, 22551226 + ... + 22551235.

It is an arithmetic number, because the mean of its divisors is an integer number (67653693).

Almost surely, 2^225512305 is an apocalyptic number.

It is an amenable number.

225512305 is a deficient number, since it is larger than the sum of its proper divisors (45102467).

225512305 is an equidigital number, since it uses as much as digits as its factorization.

225512305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45102466.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 225512305 is about 15017.0671237762. The cubic root of 225512305 is about 608.6814707532.

Adding to 225512305 its reverse (503215522), we get a palindrome (728727827).

The spelling of 225512305 in words is "two hundred twenty-five million, five hundred twelve thousand, three hundred five".