225531135 has 20 divisors (see below), whose sum is σ = 404286168. Its totient is φ = 120283056.

The previous prime is 225531109. The next prime is 225531143. The reversal of 225531135 is 531135522.

It is a happy number.

It is not a de Polignac number, because 225531135 - 2¹² = 225527039 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 225531099 and 225531108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 278029 + ... + 278838.

Almost surely, 2^225531135 is an apocalyptic number.

225531135 is a deficient number, since it is larger than the sum of its proper divisors (178755033).

225531135 is an equidigital number, since it uses as much as digits as its factorization.

225531135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556884 (or 556875 counting only the distinct ones).

The product of its digits is 4500, while the sum is 27.

The square root of 225531135 is about 15017.6940640033. The cubic root of 225531135 is about 608.6984116664.

Adding to 225531135 its reverse (531135522), we get a palindrome (756666657).

The spelling of 225531135 in words is "two hundred twenty-five million, five hundred thirty-one thousand, one hundred thirty-five".