225855865 has 16 divisors (see below), whose sum is σ = 277804800. Its totient is φ = 176248176.

The previous prime is 225855859. The next prime is 225855887. The reversal of 225855865 is 568558522.

It is not a de Polignac number, because 225855865 - 2¹⁹ = 225331577 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2721114 + ... + 2721196.

It is an arithmetic number, because the mean of its divisors is an integer number (17362800).

Almost surely, 2^225855865 is an apocalyptic number.

It is an amenable number.

225855865 is a deficient number, since it is larger than the sum of its proper divisors (51948935).

225855865 is an frugal number, since it uses more digits than its factorization.

225855865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333 (or 167 counting only the distinct ones).

The product of its digits is 960000, while the sum is 46.

The square root of 225855865 is about 15028.5017549987. The cubic root of 225855865 is about 608.9904154632.

The spelling of 225855865 in words is "two hundred twenty-five million, eight hundred fifty-five thousand, eight hundred sixty-five".