225640017 has 12 divisors (see below), whose sum is σ = 326862900. Its totient is φ = 149993568.

The previous prime is 225639977. The next prime is 225640021. The reversal of 225640017 is 710046522.

225640017 is a `hidden beast` number, since 2 + 2 + 5 + 640 + 0 + 17 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 147476736 + 78163281 = 12144^2 + 8841^2 .

It is not a de Polignac number, because 225640017 - 2⁸ = 225639761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (225640417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32778 + ... + 39059.

It is an arithmetic number, because the mean of its divisors is an integer number (27238575).

Almost surely, 2^225640017 is an apocalyptic number.

It is an amenable number.

225640017 is a deficient number, since it is larger than the sum of its proper divisors (101222883).

225640017 is a wasteful number, since it uses less digits than its factorization.

225640017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72192 (or 72189 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 225640017 is about 15021.3187503628. The cubic root of 225640017 is about 608.7963517840.

Adding to 225640017 its reverse (710046522), we get a palindrome (935686539).

The spelling of 225640017 in words is "two hundred twenty-five million, six hundred forty thousand, seventeen".