225531111 has 16 divisors (see below), whose sum is σ = 327183584. Its totient is φ = 137355264.

The previous prime is 225531109. The next prime is 225531143. The reversal of 225531111 is 111135522.

It is not a de Polignac number, because 225531111 - 2¹ = 225531109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225531101) 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, 26026 + ... + 33591.

It is an arithmetic number, because the mean of its divisors is an integer number (20448974).

Almost surely, 2^225531111 is an apocalyptic number.

225531111 is a deficient number, since it is larger than the sum of its proper divisors (101652473).

225531111 is a wasteful number, since it uses less digits than its factorization.

225531111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59730.

The product of its digits is 300, while the sum is 21.

The square root of 225531111 is about 15017.6932649459. The cubic root of 225531111 is about 608.6983900747.

Adding to 225531111 its reverse (111135522), we get a palindrome (336666633).

The spelling of 225531111 in words is "two hundred twenty-five million, five hundred thirty-one thousand, one hundred eleven".