225523565 has 8 divisors (see below), whose sum is σ = 271553688. Its totient is φ = 179801920.

The previous prime is 225523537. The next prime is 225523577. The reversal of 225523565 is 565325522.

It can be written as a sum of positive squares in 4 ways, for example, as 51652969 + 173870596 = 7187^2 + 13186^2 .

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

It is not a de Polignac number, because 225523565 - 2¹⁰ = 225522541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75506 + ... + 78435.

It is an arithmetic number, because the mean of its divisors is an integer number (33944211).

Almost surely, 2^225523565 is an apocalyptic number.

It is an amenable number.

225523565 is a deficient number, since it is larger than the sum of its proper divisors (46030123).

225523565 is a wasteful number, since it uses less digits than its factorization.

225523565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154239.

The product of its digits is 90000, while the sum is 35.

The square root of 225523565 is about 15017.4420258578. The cubic root of 225523565 is about 608.6916012267.

The spelling of 225523565 in words is "two hundred twenty-five million, five hundred twenty-three thousand, five hundred sixty-five".