225132217 has 2 divisors, whose sum is σ = 225132218. Its totient is φ = 225132216.

The previous prime is 225132203. The next prime is 225132221. The reversal of 225132217 is 712231522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121418361 + 103713856 = 11019^2 + 10184^2 .

It is a cyclic number.

It is not a de Polignac number, because 225132217 - 2¹⁵ = 225099449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 225132191 and 225132200.

It is not a weakly prime, because it can be changed into another prime (225132317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112566108 + 112566109.

It is an arithmetic number, because the mean of its divisors is an integer number (112566109).

Almost surely, 2^225132217 is an apocalyptic number.

It is an amenable number.

225132217 is a deficient number, since it is larger than the sum of its proper divisors (1).

225132217 is an equidigital number, since it uses as much as digits as its factorization.

225132217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1680, while the sum is 25.

The square root of 225132217 is about 15004.4065860666. The cubic root of 225132217 is about 608.3393125994.

Adding to 225132217 its reverse (712231522), we get a palindrome (937363739).

The spelling of 225132217 in words is "two hundred twenty-five million, one hundred thirty-two thousand, two hundred seventeen".