205134225 has 24 divisors (see below), whose sum is σ = 340677600. Its totient is φ = 108913920.

The previous prime is 205134169. The next prime is 205134227. The reversal of 205134225 is 522431502.

It is not a de Polignac number, because 205134225 - 2²⁰ = 204085649 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 205134195 and 205134204.

It is not an unprimeable number, because it can be changed into a prime (205134227) 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, 11001 + ... + 23049.

It is an arithmetic number, because the mean of its divisors is an integer number (14194900).

Almost surely, 2^205134225 is an apocalyptic number.

205134225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

205134225 is a deficient number, since it is larger than the sum of its proper divisors (135543375).

205134225 is a wasteful number, since it uses less digits than its factorization.

205134225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12289 (or 12284 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 205134225 is about 14322.5076365838. The cubic root of 205134225 is about 589.7655153624.

Adding to 205134225 its reverse (522431502), we get a palindrome (727565727).

The spelling of 205134225 in words is "two hundred five million, one hundred thirty-four thousand, two hundred twenty-five".