225871 has 2 divisors, whose sum is σ = 225872. Its totient is φ = 225870.

The previous prime is 225859. The next prime is 225889. The reversal of 225871 is 178522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 225871 - 2⁵ = 225839 is a prime.

It is a plaindrome in base 11.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112935 + 112936.

It is an arithmetic number, because the mean of its divisors is an integer number (112936).

2²²⁵⁸⁷¹ is an apocalyptic number.

225871 is a deficient number, since it is larger than the sum of its proper divisors (1).

225871 is an equidigital number, since it uses as much as digits as its factorization.

225871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1120, while the sum is 25.

The square root of 225871 is about 475.2588768240. The cubic root of 225871 is about 60.9004018333.

The spelling of 225871 in words is "two hundred twenty-five thousand, eight hundred seventy-one".