225340225 has 12 divisors (see below), whose sum is σ = 304824240. Its totient is φ = 163883600.

The previous prime is 225340217. The next prime is 225340243. The reversal of 225340225 is 522043522.

It is a happy number.

It is not a de Polignac number, because 225340225 - 2³ = 225340217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 225340225.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 409435 + ... + 409984.

It is an arithmetic number, because the mean of its divisors is an integer number (25402020).

Almost surely, 2^225340225 is an apocalyptic number.

225340225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

225340225 is a deficient number, since it is larger than the sum of its proper divisors (79484015).

225340225 is a wasteful number, since it uses less digits than its factorization.

225340225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819440 (or 819435 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 225340225 is about 15011.3365494216. The cubic root of 225340225 is about 608.5266106739.

Adding to 225340225 its reverse (522043522), we get a palindrome (747383747).

The spelling of 225340225 in words is "two hundred twenty-five million, three hundred forty thousand, two hundred twenty-five".