133500000 has 168 divisors, whose sum is σ = 442963080. Its totient is φ = 35200000.

The previous prime is 133499983. The next prime is 133500001. The reversal of 133500000 is 5331.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133500001) by changing a digit.

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 27 ways as a sum of consecutive naturals, for example, 1499956 + ... + 1500044.

It is an arithmetic number, because the mean of its divisors is an integer number (2636685).

Almost surely, 2^133500000 is an apocalyptic number.

133500000 is a gapful number since it is divisible by the number (10) 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 133500000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (221481540).

133500000 is an abundant number, since it is smaller than the sum of its proper divisors (309463080).

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

133500000 is an frugal number, since it uses more digits than its factorization.

133500000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 45, while the sum is 12.

The square root of 133500000 is about 11554.2200082913. The cubic root of 133500000 is about 511.0857300286.

Adding to 133500000 its reverse (5331), we get a palindrome (133505331).

The spelling of 133500000 in words is "one hundred thirty-three million, five hundred thousand".