225550225 has 24 divisors (see below), whose sum is σ = 288215928. Its totient is φ = 174988800.

The previous prime is 225550219. The next prime is 225550229. The reversal of 225550225 is 522055522.

It can be written as a sum of positive squares in 12 ways, for example, as 111999889 + 113550336 = 10583^2 + 10656^2 .

It is not a de Polignac number, because 225550225 - 2⁹ = 225549713 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 225550193 and 225550202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225550229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 201367 + ... + 202483.

It is an arithmetic number, because the mean of its divisors is an integer number (12008997).

Almost surely, 2^225550225 is an apocalyptic number.

225550225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

225550225 is a deficient number, since it is larger than the sum of its proper divisors (62665703).

225550225 is a wasteful number, since it uses less digits than its factorization.

225550225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1365 (or 1360 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 28.

The square root of 225550225 is about 15018.3296341504. The cubic root of 225550225 is about 608.7155855329.

The spelling of 225550225 in words is "two hundred twenty-five million, five hundred fifty thousand, two hundred twenty-five".