225643305 has 8 divisors (see below), whose sum is σ = 361029312. Its totient is φ = 120343088.

The previous prime is 225643303. The next prime is 225643307. The reversal of 225643305 is 503346522.

225643305 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (225643303) and next prime (225643307).

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 225643305 - 2¹ = 225643303 is a prime.

It is not an unprimeable number, because it can be changed into a prime (225643303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7521429 + ... + 7521458.

It is an arithmetic number, because the mean of its divisors is an integer number (45128664).

Almost surely, 2^225643305 is an apocalyptic number.

It is an amenable number.

225643305 is a deficient number, since it is larger than the sum of its proper divisors (135386007).

225643305 is a wasteful number, since it uses less digits than its factorization.

225643305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15042895.

The product of its (nonzero) digits is 21600, while the sum is 30.

The square root of 225643305 is about 15021.4281944161. The cubic root of 225643305 is about 608.7993088728.

Adding to 225643305 its reverse (503346522), we get a palindrome (728989827).

The spelling of 225643305 in words is "two hundred twenty-five million, six hundred forty-three thousand, three hundred five".