133555303320 has 128 divisors (see below), whose sum is σ = 406421971200. Its totient is φ = 35105068544.

The previous prime is 133555303289. The next prime is 133555303339. The reversal of 133555303320 is 23303555331.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4397146 + ... + 4427414.

It is an arithmetic number, because the mean of its divisors is an integer number (3175171650).

Almost surely, 2^133555303320 is an apocalyptic number.

133555303320 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 133555303320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (203210985600).

133555303320 is an abundant number, since it is smaller than the sum of its proper divisors (272866667880).

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

133555303320 is a wasteful number, since it uses less digits than its factorization.

133555303320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30809 (or 30805 counting only the distinct ones).

The product of its (nonzero) digits is 60750, while the sum is 33.

Adding to 133555303320 its reverse (23303555331), we get a palindrome (156858858651).

The spelling of 133555303320 in words is "one hundred thirty-three billion, five hundred fifty-five million, three hundred three thousand, three hundred twenty".