133508232 has 96 divisors (see below), whose sum is σ = 424831680. Its totient is φ = 37342080.

The previous prime is 133508213. The next prime is 133508233. The reversal of 133508232 is 232805331.

133508232 is a `hidden beast` number, since 133 + 508 + 23 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 133508196 and 133508205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133508233) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3813 + ... + 16779.

It is an arithmetic number, because the mean of its divisors is an integer number (4425330).

Almost surely, 2^133508232 is an apocalyptic number.

133508232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133508232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212415840).

133508232 is an abundant number, since it is smaller than the sum of its proper divisors (291323448).

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

133508232 is a wasteful number, since it uses less digits than its factorization.

133508232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13003 (or 12996 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 133508232 is about 11554.5762362797. The cubic root of 133508232 is about 511.0962348257.

The spelling of 133508232 in words is "one hundred thirty-three million, five hundred eight thousand, two hundred thirty-two".