225666871 has 4 divisors (see below), whose sum is σ = 228758272. Its totient is φ = 222575472.

The previous prime is 225666853. The next prime is 225666913. The reversal of 225666871 is 178666522.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 225666871 - 2¹¹ = 225664823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225666841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1545591 + ... + 1545736.

It is an arithmetic number, because the mean of its divisors is an integer number (57189568).

Almost surely, 2^225666871 is an apocalyptic number.

225666871 is a deficient number, since it is larger than the sum of its proper divisors (3091401).

225666871 is an equidigital number, since it uses as much as digits as its factorization.

225666871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3091400.

The product of its digits is 241920, while the sum is 43.

The square root of 225666871 is about 15022.2125866997. The cubic root of 225666871 is about 608.8205023003.

The spelling of 225666871 in words is "two hundred twenty-five million, six hundred sixty-six thousand, eight hundred seventy-one".