225566890 has 16 divisors (see below), whose sum is σ = 412081632. Its totient is φ = 88879824.

The previous prime is 225566857. The next prime is 225566899. The reversal of 225566890 is 98665522.

225566890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 167664 + ... + 169003.

It is an arithmetic number, because the mean of its divisors is an integer number (25755102).

Almost surely, 2^225566890 is an apocalyptic number.

225566890 is a deficient number, since it is larger than the sum of its proper divisors (186514742).

225566890 is a wasteful number, since it uses less digits than its factorization.

225566890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336741.

The product of its (nonzero) digits is 259200, while the sum is 43.

The square root of 225566890 is about 15018.8844459234. The cubic root of 225566890 is about 608.7305770134.

The spelling of 225566890 in words is "two hundred twenty-five million, five hundred sixty-six thousand, eight hundred ninety".