135511212 has 12 divisors (see below), whose sum is σ = 316192856. Its totient is φ = 45170400.

The previous prime is 135511183. The next prime is 135511219. The reversal of 135511212 is 212115531.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (135511219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5646289 + ... + 5646312.

Almost surely, 2^135511212 is an apocalyptic number.

135511212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

135511212 is an abundant number, since it is smaller than the sum of its proper divisors (180681644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135511212 is a wasteful number, since it uses less digits than its factorization.

135511212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11292608 (or 11292606 counting only the distinct ones).

The product of its digits is 300, while the sum is 21.

The square root of 135511212 is about 11640.9283134980. The cubic root of 135511212 is about 513.6394944688.

Adding to 135511212 its reverse (212115531), we get a palindrome (347626743).

The spelling of 135511212 in words is "one hundred thirty-five million, five hundred eleven thousand, two hundred twelve".