225415217 has 2 divisors, whose sum is σ = 225415218. Its totient is φ = 225415216.

The previous prime is 225415207. The next prime is 225415277. The reversal of 225415217 is 712514522.

It is a happy number.

225415217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187580416 + 37834801 = 13696^2 + 6151^2 .

It is a cyclic number.

It is not a de Polignac number, because 225415217 - 2⁶ = 225415153 is a prime.

It is a Chen prime.

It is equal to p_12404378 and since 225415217 and 12404378 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 225415217.

It is not a weakly prime, because it can be changed into another prime (225415207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112707608 + 112707609.

It is an arithmetic number, because the mean of its divisors is an integer number (112707609).

Almost surely, 2^225415217 is an apocalyptic number.

It is an amenable number.

225415217 is a deficient number, since it is larger than the sum of its proper divisors (1).

225415217 is an equidigital number, since it uses as much as digits as its factorization.

225415217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5600, while the sum is 29.

The square root of 225415217 is about 15013.8341871755. The cubic root of 225415217 is about 608.5941079678.

Adding to 225415217 its reverse (712514522), we get a palindrome (937929739).

It can be divided in two parts, 2254 and 15217, that added together give a palindrome (17471).

The spelling of 225415217 in words is "two hundred twenty-five million, four hundred fifteen thousand, two hundred seventeen".