205324225 has 6 divisors (see below), whose sum is σ = 254602070. Its totient is φ = 164259360.

The previous prime is 205324199. The next prime is 205324237. The reversal of 205324225 is 522423502.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1062961 + 204261264 = 1031^2 + 14292^2 .

It is not a de Polignac number, because 205324225 - 2¹¹ = 205322177 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 8212969 = 205324225 / (2 + 0 + 5 + 3 + 2 + 4 + 2 + 2 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 205324225.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4106460 + ... + 4106509.

Almost surely, 2^205324225 is an apocalyptic number.

205324225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

205324225 is a deficient number, since it is larger than the sum of its proper divisors (49277845).

205324225 is an equidigital number, since it uses as much as digits as its factorization.

205324225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8212979 (or 8212974 counting only the distinct ones).

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

The square root of 205324225 is about 14329.1390180987. The cubic root of 205324225 is about 589.9475439335.

Adding to 205324225 its reverse (522423502), we get a palindrome (727747727).

The spelling of 205324225 in words is "two hundred five million, three hundred twenty-four thousand, two hundred twenty-five".