225601945 has 8 divisors (see below), whose sum is σ = 271220544. Its totient is φ = 180149424.

The previous prime is 225601939. The next prime is 225601997. The reversal of 225601945 is 549106522.

It is a happy number.

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 225601945 - 2⁹ = 225601433 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 225601945.

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, 38509 + ... + 43978.

It is an arithmetic number, because the mean of its divisors is an integer number (33902568).

Almost surely, 2^225601945 is an apocalyptic number.

It is an amenable number.

225601945 is a deficient number, since it is larger than the sum of its proper divisors (45618599).

225601945 is an equidigital number, since it uses as much as digits as its factorization.

225601945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83039.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 225601945 is about 15020.0514313367. The cubic root of 225601945 is about 608.7621093378.

The spelling of 225601945 in words is "two hundred twenty-five million, six hundred one thousand, nine hundred forty-five".