225512065 has 4 divisors (see below), whose sum is σ = 270614484. Its totient is φ = 180409648.

The previous prime is 225512051. The next prime is 225512087. The reversal of 225512065 is 560215522.

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 122611329 + 102900736 = 11073^2 + 10144^2 .

It is a cyclic number.

It is not a de Polignac number, because 225512065 - 2⁹ = 225511553 is a prime.

It is a super-3 number, since 3×225512065³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22551202 + ... + 22551211.

It is an arithmetic number, because the mean of its divisors is an integer number (67653621).

Almost surely, 2^225512065 is an apocalyptic number.

It is an amenable number.

225512065 is a deficient number, since it is larger than the sum of its proper divisors (45102419).

225512065 is an equidigital number, since it uses as much as digits as its factorization.

225512065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45102418.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 225512065 is about 15017.0591328662. The cubic root of 225512065 is about 608.6812548247.

Adding to 225512065 its reverse (560215522), we get a palindrome (785727587).

The spelling of 225512065 in words is "two hundred twenty-five million, five hundred twelve thousand, sixty-five".