225523765 has 8 divisors (see below), whose sum is σ = 270777528. Its totient is φ = 180319680.

The previous prime is 225523757. The next prime is 225523789. The reversal of 225523765 is 567325522.

225523765 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 40373316 + 185150449 = 6354^2 + 13607^2 .

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

It is not a de Polignac number, because 225523765 - 2³ = 225523757 is a prime.

It is a Duffinian number.

It is a congruent 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, 1566 + ... + 21295.

It is an arithmetic number, because the mean of its divisors is an integer number (33847191).

Almost surely, 2^225523765 is an apocalyptic number.

It is an amenable number.

225523765 is a deficient number, since it is larger than the sum of its proper divisors (45253763).

225523765 is a wasteful number, since it uses less digits than its factorization.

225523765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24839.

The product of its digits is 126000, while the sum is 37.

The square root of 225523765 is about 15017.4486847800. The cubic root of 225523765 is about 608.6917811611.

The spelling of 225523765 in words is "two hundred twenty-five million, five hundred twenty-three thousand, seven hundred sixty-five".