225566889 has 8 divisors (see below), whose sum is σ = 303515520. Its totient is φ = 148998096.

The previous prime is 225566857. The next prime is 225566899. The reversal of 225566889 is 988665522.

225566889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 225566889 - 2⁵ = 225566857 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (225566899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 344577 + ... + 345230.

It is an arithmetic number, because the mean of its divisors is an integer number (37939440).

Almost surely, 2^225566889 is an apocalyptic number.

It is an amenable number.

225566889 is a deficient number, since it is larger than the sum of its proper divisors (77948631).

225566889 is a wasteful number, since it uses less digits than its factorization.

225566889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689919.

The product of its digits is 2073600, while the sum is 51.

The square root of 225566889 is about 15018.8844126320. The cubic root of 225566889 is about 608.7305761138.

The spelling of 225566889 in words is "two hundred twenty-five million, five hundred sixty-six thousand, eight hundred eighty-nine".