13205134225 has 6 divisors (see below), whose sum is σ = 16374366470. Its totient is φ = 10564107360.

The previous prime is 13205134223. The next prime is 13205134247. The reversal of 13205134225 is 52243150231.

It can be written as a sum of positive squares in 3 ways, for example, as 1200206736 + 12004927489 = 34644^2 + 109567^2 .

It is not a de Polignac number, because 13205134225 - 2¹ = 13205134223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13205134193 and 13205134202.

It is not an unprimeable number, because it can be changed into a prime (13205134223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 264102660 + ... + 264102709.

Almost surely, 2^13205134225 is an apocalyptic number.

It is an amenable number.

13205134225 is a deficient number, since it is larger than the sum of its proper divisors (3169232245).

13205134225 is an equidigital number, since it uses as much as digits as its factorization.

13205134225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528205379 (or 528205374 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 13205134225 its reverse (52243150231), we get a palindrome (65448284456).

The spelling of 13205134225 in words is "thirteen billion, two hundred five million, one hundred thirty-four thousand, two hundred twenty-five".