225727618 has 4 divisors (see below), whose sum is σ = 338591430. Its totient is φ = 112863808.

The previous prime is 225727603. The next prime is 225727637. The reversal of 225727618 is 816727522.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 175218169 + 50509449 = 13237^2 + 7107^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56431903 + ... + 56431906.

Almost surely, 2^225727618 is an apocalyptic number.

225727618 is a deficient number, since it is larger than the sum of its proper divisors (112863812).

225727618 is a wasteful number, since it uses less digits than its factorization.

225727618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112863811.

The product of its digits is 94080, while the sum is 40.

The square root of 225727618 is about 15024.2343565321. The cubic root of 225727618 is about 608.8751266245.

The spelling of 225727618 in words is "two hundred twenty-five million, seven hundred twenty-seven thousand, six hundred eighteen".