225040225 has 12 divisors (see below), whose sum is σ = 279809596. Its totient is φ = 179542080.

The previous prime is 225040223. The next prime is 225040247. The reversal of 225040225 is 522040522.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 4695889 + 220344336 = 2167^2 + 14844^2 .

It is not a de Polignac number, because 225040225 - 2¹ = 225040223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 225040196 and 225040205.

It is not an unprimeable number, because it can be changed into a prime (225040223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2742 + ... + 21391.

Almost surely, 2^225040225 is an apocalyptic number.

225040225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

225040225 is a deficient number, since it is larger than the sum of its proper divisors (54769371).

225040225 is a wasteful number, since it uses less digits than its factorization.

225040225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24516 (or 24511 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 225040225 is about 15001.3407734109. The cubic root of 225040225 is about 608.2564428162.

Adding to 225040225 its reverse (522040522), we get a palindrome (747080747).

The spelling of 225040225 in words is "two hundred twenty-five million, forty thousand, two hundred twenty-five".