135212228 has 12 divisors (see below), whose sum is σ = 236737452. Its totient is φ = 67572960.

The previous prime is 135212221. The next prime is 135212257. The reversal of 135212228 is 822212531.

135212228 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 62758084 + 72454144 = 7922^2 + 8512^2 .

It is a junction number, because it is equal to n+sod(n) for n = 135212197 and 135212206.

It is not an unprimeable number, because it can be changed into a prime (135212221) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2426 + ... + 16622.

It is an arithmetic number, because the mean of its divisors is an integer number (19728121).

Almost surely, 2^135212228 is an apocalyptic number.

It is an amenable number.

135212228 is a deficient number, since it is larger than the sum of its proper divisors (101525224).

135212228 is a wasteful number, since it uses less digits than its factorization.

135212228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16582 (or 16580 counting only the distinct ones).

The product of its digits is 1920, while the sum is 26.

The square root of 135212228 is about 11628.0792910953. The cubic root of 135212228 is about 513.2614616118.

Adding to 135212228 its reverse (822212531), we get a palindrome (957424759).

The spelling of 135212228 in words is "one hundred thirty-five million, two hundred twelve thousand, two hundred twenty-eight".