225217115 has 4 divisors (see below), whose sum is σ = 270260544. Its totient is φ = 180173688.

The previous prime is 225217099. The next prime is 225217117. The reversal of 225217115 is 511712522.

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

It is a cyclic number.

It is not a de Polignac number, because 225217115 - 2⁴ = 225217099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225217117) 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, 22521707 + ... + 22521716.

It is an arithmetic number, because the mean of its divisors is an integer number (67565136).

Almost surely, 2^225217115 is an apocalyptic number.

225217115 is a deficient number, since it is larger than the sum of its proper divisors (45043429).

225217115 is an equidigital number, since it uses as much as digits as its factorization.

225217115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45043428.

The product of its digits is 1400, while the sum is 26.

The square root of 225217115 is about 15007.2354216225. The cubic root of 225217115 is about 608.4157718182.

Adding to 225217115 its reverse (511712522), we get a palindrome (736929637).

The spelling of 225217115 in words is "two hundred twenty-five million, two hundred seventeen thousand, one hundred fifteen".