225911 has 8 divisors (see below), whose sum is σ = 263040. Its totient is φ = 190008.

The previous prime is 225889. The next prime is 225919. The reversal of 225911 is 119522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-225911 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 (225919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140 + ... + 686.

It is an arithmetic number, because the mean of its divisors is an integer number (32880).

2²²⁵⁹¹¹ is an apocalyptic number.

225911 is a deficient number, since it is larger than the sum of its proper divisors (37129).

225911 is an equidigital number, since it uses as much as digits as its factorization.

225911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613.

The product of its digits is 180, while the sum is 20.

The square root of 225911 is about 475.3009572892. The cubic root of 225911 is about 60.9039966172.

The spelling of 225911 in words is "two hundred twenty-five thousand, nine hundred eleven".