133538432 has 32 divisors (see below), whose sum is σ = 266587200. Its totient is φ = 66630400.

The previous prime is 133538401. The next prime is 133538453. The reversal of 133538432 is 234835331.

133538432 is digitally balanced in base 3, 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 (32).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

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, 91307 + ... + 92757.

It is an arithmetic number, because the mean of its divisors is an integer number (8330850).

Almost surely, 2^133538432 is an apocalyptic number.

It is an amenable number.

133538432 is a deficient number, since it is larger than the sum of its proper divisors (133048768).

133538432 is an equidigital number, since it uses as much as digits as its factorization.

133538432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2184 (or 2172 counting only the distinct ones).

The product of its digits is 25920, while the sum is 32.

The square root of 133538432 is about 11555.8830039076. The cubic root of 133538432 is about 511.1347691353.

The spelling of 133538432 in words is "one hundred thirty-three million, five hundred thirty-eight thousand, four hundred thirty-two".