133555580 has 24 divisors (see below), whose sum is σ = 280687680. Its totient is φ = 53380160.

The previous prime is 133555577. The next prime is 133555603. The reversal of 133555580 is 85555331.

It is a super-3 number, since 3×133555580³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 133555580.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41261 + ... + 44379.

It is an arithmetic number, because the mean of its divisors is an integer number (11695320).

Almost surely, 2^133555580 is an apocalyptic number.

133555580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133555580 is an abundant number, since it is smaller than the sum of its proper divisors (147132100).

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

133555580 is a wasteful number, since it uses less digits than its factorization.

133555580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5269 (or 5267 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 35.

The square root of 133555580 is about 11556.6249398343. The cubic root of 133555580 is about 511.1566468917.

The spelling of 133555580 in words is "one hundred thirty-three million, five hundred fifty-five thousand, five hundred eighty".