133310232 has 128 divisors (see below), whose sum is σ = 425376000. Its totient is φ = 38257920.

The previous prime is 133310183. The next prime is 133310237. The reversal of 133310232 is 232013331.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133310237) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43668 + ... + 46620.

It is an arithmetic number, because the mean of its divisors is an integer number (3323250).

Almost surely, 2^133310232 is an apocalyptic number.

133310232 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 133310232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212688000).

133310232 is an abundant number, since it is smaller than the sum of its proper divisors (292065768).

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

133310232 is a wasteful number, since it uses less digits than its factorization.

133310232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2998 (or 2988 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 133310232 is about 11546.0050233836. The cubic root of 133310232 is about 510.8434486088.

Adding to 133310232 its reverse (232013331), we get a palindrome (365323563).

The spelling of 133310232 in words is "one hundred thirty-three million, three hundred ten thousand, two hundred thirty-two".