135206225 has 24 divisors (see below), whose sum is σ = 209028288. Its totient is φ = 84283200.

The previous prime is 135206191. The next prime is 135206237. The reversal of 135206225 is 522602531.

It is not a de Polignac number, because 135206225 - 2¹⁴ = 135189841 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 135206194 and 135206203.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33194 + ... + 37043.

It is an arithmetic number, because the mean of its divisors is an integer number (8709512).

Almost surely, 2^135206225 is an apocalyptic number.

It is an amenable number.

135206225 is a deficient number, since it is larger than the sum of its proper divisors (73822063).

135206225 is a wasteful number, since it uses less digits than its factorization.

135206225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70265 (or 70260 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 135206225 is about 11627.8211630554. The cubic root of 135206225 is about 513.2538657649.

Adding to 135206225 its reverse (522602531), we get a palindrome (657808756).

The spelling of 135206225 in words is "one hundred thirty-five million, two hundred six thousand, two hundred twenty-five".