225111 has 4 divisors (see below), whose sum is σ = 300152. Its totient is φ = 150072.

The previous prime is 225109. The next prime is 225119. The reversal of 225111 is 111522.

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

It is not a de Polignac number, because 225111 - 2¹ = 225109 is a prime.

It is a D-number.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a zygodrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37516 + ... + 37521.

It is an arithmetic number, because the mean of its divisors is an integer number (75038).

2²²⁵¹¹¹ is an apocalyptic number.

225111 is a deficient number, since it is larger than the sum of its proper divisors (75041).

225111 is an equidigital number, since it uses as much as digits as its factorization.

225111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75040.

The product of its digits is 20, while the sum is 12.

The square root of 225111 is about 474.4586388717. The cubic root of 225111 is about 60.8320201547.

Adding to 225111 its reverse (111522), we get a palindrome (336633).

The spelling of 225111 in words is "two hundred twenty-five thousand, one hundred eleven".