225969985 has 4 divisors (see below), whose sum is σ = 271163988. Its totient is φ = 180775984.

The previous prime is 225969979. The next prime is 225970013. The reversal of 225969985 is 589969522.

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 160554241 + 65415744 = 12671^2 + 8088^2 .

It is a cyclic number.

It is not a de Polignac number, because 225969985 - 2¹³ = 225961793 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22596994 + ... + 22597003.

It is an arithmetic number, because the mean of its divisors is an integer number (67790997).

Almost surely, 2^225969985 is an apocalyptic number.

It is an amenable number.

225969985 is a deficient number, since it is larger than the sum of its proper divisors (45194003).

225969985 is an equidigital number, since it uses as much as digits as its factorization.

225969985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45194002.

The product of its digits is 3499200, while the sum is 55.

The square root of 225969985 is about 15032.2980611748. The cubic root of 225969985 is about 609.0929680125.

The spelling of 225969985 in words is "two hundred twenty-five million, nine hundred sixty-nine thousand, nine hundred eighty-five".