135221052 has 12 divisors (see below), whose sum is σ = 315515816. Its totient is φ = 45073680.

The previous prime is 135221033. The next prime is 135221063. The reversal of 135221052 is 250122531.

135221052 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5634199 + ... + 5634222.

Almost surely, 2^135221052 is an apocalyptic number.

135221052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

135221052 is an abundant number, since it is smaller than the sum of its proper divisors (180294764).

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

135221052 is a wasteful number, since it uses less digits than its factorization.

135221052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11268428 (or 11268426 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 135221052 is about 11628.4587112824. The cubic root of 135221052 is about 513.2726265798.

Adding to 135221052 its reverse (250122531), we get a palindrome (385343583).

The spelling of 135221052 in words is "one hundred thirty-five million, two hundred twenty-one thousand, fifty-two".