225709865 has 8 divisors (see below), whose sum is σ = 272136768. Its totient is φ = 179711280.

The previous prime is 225709843. The next prime is 225709877. The reversal of 225709865 is 568907522.

225709865 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 225709865 - 2⁸ = 225709609 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105917 + ... + 108026.

It is an arithmetic number, because the mean of its divisors is an integer number (34017096).

Almost surely, 2^225709865 is an apocalyptic number.

It is an amenable number.

225709865 is a deficient number, since it is larger than the sum of its proper divisors (46426903).

225709865 is a wasteful number, since it uses less digits than its factorization.

225709865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214159.

The product of its (nonzero) digits is 302400, while the sum is 44.

The square root of 225709865 is about 15023.6435327786. The cubic root of 225709865 is about 608.8591639588.

The spelling of 225709865 in words is "two hundred twenty-five million, seven hundred nine thousand, eight hundred sixty-five".