225521524 has 24 divisors (see below), whose sum is σ = 418461120. Its totient is φ = 105979776.

The previous prime is 225521503. The next prime is 225521533. The reversal of 225521524 is 425125522.

It is a junction number, because it is equal to n+sod(n) for n = 225521492 and 225521501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58447 + ... + 62185.

It is an arithmetic number, because the mean of its divisors is an integer number (17435880).

Almost surely, 2^225521524 is an apocalyptic number.

It is an amenable number.

225521524 is a deficient number, since it is larger than the sum of its proper divisors (192939596).

225521524 is a wasteful number, since it uses less digits than its factorization.

225521524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4647 (or 4645 counting only the distinct ones).

The product of its digits is 8000, while the sum is 28.

The square root of 225521524 is about 15017.3740713881. The cubic root of 225521524 is about 608.6897649910.

The spelling of 225521524 in words is "two hundred twenty-five million, five hundred twenty-one thousand, five hundred twenty-four".