133557132 has 24 divisors (see below), whose sum is σ = 313270272. Its totient is φ = 44285200.

The previous prime is 133557119. The next prime is 133557133. The reversal of 133557132 is 231755331.

133557132 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 133557132.

It is not an unprimeable number, because it can be changed into a prime (133557133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26844 + ... + 31427.

It is an arithmetic number, because the mean of its divisors is an integer number (13052928).

Almost surely, 2^133557132 is an apocalyptic number.

133557132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

133557132 is an abundant number, since it is smaller than the sum of its proper divisors (179713140).

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

133557132 is a wasteful number, since it uses less digits than its factorization.

133557132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58469 (or 58467 counting only the distinct ones).

The product of its digits is 9450, while the sum is 30.

The square root of 133557132 is about 11556.6920872713. The cubic root of 133557132 is about 511.1586268715.

The spelling of 133557132 in words is "one hundred thirty-three million, five hundred fifty-seven thousand, one hundred thirty-two".