225771 has 16 divisors (see below), whose sum is σ = 370944. Its totient is φ = 118944.

The previous prime is 225769. The next prime is 225779. The reversal of 225771 is 177522.

It is not a de Polignac number, because 225771 - 2¹ = 225769 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225779) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141 + ... + 686.

It is an arithmetic number, because the mean of its divisors is an integer number (23184).

2²²⁵⁷⁷¹ is an apocalyptic number.

225771 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

225771 is a deficient number, since it is larger than the sum of its proper divisors (145173).

225771 is a wasteful number, since it uses less digits than its factorization.

225771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850.

The product of its digits is 980, while the sum is 24.

The square root of 225771 is about 475.1536593566. The cubic root of 225771 is about 60.8914130165.

It can be divided in two parts, 22577 and 1, that added together give a triangular number (22578 = T₂₁₂).

The spelling of 225771 in words is "two hundred twenty-five thousand, seven hundred seventy-one".