225615566 has 16 divisors (see below), whose sum is σ = 379168560. Its totient is φ = 99780480.

The previous prime is 225615521. The next prime is 225615571. The reversal of 225615566 is 665516522.

It is a happy number.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 137771 + ... + 139398.

It is an arithmetic number, because the mean of its divisors is an integer number (23698035).

Almost surely, 2^225615566 is an apocalyptic number.

225615566 is a deficient number, since it is larger than the sum of its proper divisors (153552994).

225615566 is a wasteful number, since it uses less digits than its factorization.

225615566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277219.

The product of its digits is 108000, while the sum is 38.

The square root of 225615566 is about 15020.5048517019. The cubic root of 225615566 is about 608.7743606829.

The spelling of 225615566 in words is "two hundred twenty-five million, six hundred fifteen thousand, five hundred sixty-six".