225506565 has 16 divisors (see below), whose sum is σ = 400900800. Its totient is φ = 120270096.

The previous prime is 225506557. The next prime is 225506587. The reversal of 225506565 is 565605522.

225506565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 225506565 - 2³ = 225506557 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

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, 835075 + ... + 835344.

It is an arithmetic number, because the mean of its divisors is an integer number (25056300).

Almost surely, 2^225506565 is an apocalyptic number.

It is an amenable number.

225506565 is a deficient number, since it is larger than the sum of its proper divisors (175394235).

225506565 is a wasteful number, since it uses less digits than its factorization.

225506565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1670433 (or 1670427 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

The square root of 225506565 is about 15016.8760066800. The cubic root of 225506565 is about 608.6763064212.

The spelling of 225506565 in words is "two hundred twenty-five million, five hundred six thousand, five hundred sixty-five".