225031171 has 2 divisors, whose sum is σ = 225031172. Its totient is φ = 225031170.

The previous prime is 225031141. The next prime is 225031181. The reversal of 225031171 is 171130522.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 225031171 - 2¹⁷ = 224900099 is a prime.

It is not a weakly prime, because it can be changed into another prime (225031141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112515585 + 112515586.

It is an arithmetic number, because the mean of its divisors is an integer number (112515586).

Almost surely, 2^225031171 is an apocalyptic number.

225031171 is a deficient number, since it is larger than the sum of its proper divisors (1).

225031171 is an equidigital number, since it uses as much as digits as its factorization.

225031171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 225031171 is about 15001.0389973495. The cubic root of 225031171 is about 608.2482854187.

Adding to 225031171 its reverse (171130522), we get a palindrome (396161693).

The spelling of 225031171 in words is "two hundred twenty-five million, thirty-one thousand, one hundred seventy-one".