225219985 has 4 divisors (see below), whose sum is σ = 270263988. Its totient is φ = 180175984.

The previous prime is 225219983. The next prime is 225219989. The reversal of 225219985 is 589912522.

225219985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 138674176 + 86545809 = 11776^2 + 9303^2 .

It is a cyclic number.

It is not a de Polignac number, because 225219985 - 2¹ = 225219983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225219983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22521994 + ... + 22522003.

It is an arithmetic number, because the mean of its divisors is an integer number (67565997).

Almost surely, 2^225219985 is an apocalyptic number.

It is an amenable number.

225219985 is a deficient number, since it is larger than the sum of its proper divisors (45044003).

225219985 is an equidigital number, since it uses as much as digits as its factorization.

225219985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45044002.

The product of its digits is 129600, while the sum is 43.

The square root of 225219985 is about 15007.3310418608. The cubic root of 225219985 is about 608.4183562071.

The spelling of 225219985 in words is "two hundred twenty-five million, two hundred nineteen thousand, nine hundred eighty-five".