135217225 has 48 divisors (see below), whose sum is σ = 199362240. Its totient is φ = 89683200.

The previous prime is 135217223. The next prime is 135217237. The reversal of 135217225 is 522712531.

It is not a de Polignac number, because 135217225 - 2¹ = 135217223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 135217193 and 135217202.

It is not an unprimeable number, because it can be changed into a prime (135217223) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 389502 + ... + 389848.

It is an arithmetic number, because the mean of its divisors is an integer number (4153380).

Almost surely, 2^135217225 is an apocalyptic number.

It is an amenable number.

135217225 is a deficient number, since it is larger than the sum of its proper divisors (64145015).

135217225 is a wasteful number, since it uses less digits than its factorization.

135217225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490 (or 485 counting only the distinct ones).

The product of its digits is 4200, while the sum is 28.

The square root of 135217225 is about 11628.2941569260. The cubic root of 135217225 is about 513.2677843534.

Adding to 135217225 its reverse (522712531), we get a palindrome (657929756).

The spelling of 135217225 in words is "one hundred thirty-five million, two hundred seventeen thousand, two hundred twenty-five".