225531123 has 16 divisors (see below), whose sum is σ = 314136576. Its totient is φ = 143654720.

The previous prime is 225531109. The next prime is 225531143. The reversal of 225531123 is 321135522.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 225531123 - 2¹⁰ = 225530099 is a prime.

It is a super-2 number, since 2×225531123² = 101728574883282258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 225531093 and 225531102.

It is not an unprimeable number, because it can be changed into a prime (225531143) 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, 101086 + ... + 103292.

It is an arithmetic number, because the mean of its divisors is an integer number (19633536).

Almost surely, 2^225531123 is an apocalyptic number.

225531123 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

225531123 is a deficient number, since it is larger than the sum of its proper divisors (88605453).

225531123 is a wasteful number, since it uses less digits than its factorization.

225531123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3714.

The product of its digits is 1800, while the sum is 24.

The square root of 225531123 is about 15017.6936644746. The cubic root of 225531123 is about 608.6984008705.

Adding to 225531123 its reverse (321135522), we get a palindrome (546666645).

The spelling of 225531123 in words is "two hundred twenty-five million, five hundred thirty-one thousand, one hundred twenty-three".