225223171 has 2 divisors, whose sum is σ = 225223172. Its totient is φ = 225223170.

The previous prime is 225223099. The next prime is 225223183. The reversal of 225223171 is 171322522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 225223171 - 2⁷ = 225223043 is a prime.

It is not a weakly prime, because it can be changed into another prime (225224171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112611585 + 112611586.

It is an arithmetic number, because the mean of its divisors is an integer number (112611586).

Almost surely, 2^225223171 is an apocalyptic number.

225223171 is a deficient number, since it is larger than the sum of its proper divisors (1).

225223171 is an equidigital number, since it uses as much as digits as its factorization.

225223171 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 225223171 is about 15007.4371896070. The cubic root of 225223171 is about 608.4212251232.

Adding to 225223171 its reverse (171322522), we get a palindrome (396545693).

The spelling of 225223171 in words is "two hundred twenty-five million, two hundred twenty-three thousand, one hundred seventy-one".