225105305 has 8 divisors (see below), whose sum is σ = 270487752. Its totient is φ = 179843328.

The previous prime is 225105289. The next prime is 225105319. The reversal of 225105305 is 503501522.

It can be written as a sum of positive squares in 4 ways, for example, as 46936201 + 178169104 = 6851^2 + 13348^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 225105305 - 2⁴ = 225105289 is a prime.

It is a Duffinian number.

It is a Curzon 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, 25952 + ... + 33521.

It is an arithmetic number, because the mean of its divisors is an integer number (33810969).

Almost surely, 2^225105305 is an apocalyptic number.

It is an amenable number.

225105305 is a deficient number, since it is larger than the sum of its proper divisors (45382447).

225105305 is an equidigital number, since it uses as much as digits as its factorization.

225105305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60235.

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 225105305 is about 15003.5097560537. The cubic root of 225105305 is about 608.3150716146.

Adding to 225105305 its reverse (503501522), we get a palindrome (728606827).

The spelling of 225105305 in words is "two hundred twenty-five million, one hundred five thousand, three hundred five".