225971 has 4 divisors (see below), whose sum is σ = 228600. Its totient is φ = 223344.

The previous prime is 225961. The next prime is 225977. The reversal of 225971 is 179522.

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 225971 - 2¹⁰ = 224947 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 225971.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225977) 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 in 3 ways as a sum of consecutive naturals, for example, 1181 + ... + 1358.

It is an arithmetic number, because the mean of its divisors is an integer number (57150).

2²²⁵⁹⁷¹ is an apocalyptic number.

225971 is a deficient number, since it is larger than the sum of its proper divisors (2629).

225971 is an equidigital number, since it uses as much as digits as its factorization.

225971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2628.

The product of its digits is 1260, while the sum is 26.

The square root of 225971 is about 475.3640710024. The cubic root of 225971 is about 60.9093879975.

The spelling of 225971 in words is "two hundred twenty-five thousand, nine hundred seventy-one".