133505508 has 12 divisors (see below), whose sum is σ = 311512880. Its totient is φ = 44501832.

The previous prime is 133505503. The next prime is 133505527. The reversal of 133505508 is 805505331.

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 (133505503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5562718 + ... + 5562741.

Almost surely, 2^133505508 is an apocalyptic number.

It is an amenable number.

133505508 is an abundant number, since it is smaller than the sum of its proper divisors (178007372).

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

133505508 is a wasteful number, since it uses less digits than its factorization.

133505508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11125466 (or 11125464 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 133505508 is about 11554.4583603040. The cubic root of 133505508 is about 511.0927587963.

The spelling of 133505508 in words is "one hundred thirty-three million, five hundred five thousand, five hundred eight".