133305500 has 48 divisors (see below), whose sum is σ = 308284704. Its totient is φ = 50182400.

The previous prime is 133305481. The next prime is 133305503. The reversal of 133305500 is 5503331.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133305503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 659 + ... + 16341.

It is an arithmetic number, because the mean of its divisors is an integer number (6422598).

Almost surely, 2^133305500 is an apocalyptic number.

133305500 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 133305500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154142352).

133305500 is an abundant number, since it is smaller than the sum of its proper divisors (174979204).

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

133305500 is a wasteful number, since it uses less digits than its factorization.

133305500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15719 (or 15707 counting only the distinct ones).

The product of its (nonzero) digits is 675, while the sum is 20.

The square root of 133305500 is about 11545.8001022017. The cubic root of 133305500 is about 510.8374042121.

Adding to 133305500 its reverse (5503331), we get a palindrome (138808831).

The spelling of 133305500 in words is "one hundred thirty-three million, three hundred five thousand, five hundred".