133555000 has 40 divisors (see below), whose sum is σ = 312931080. Its totient is φ = 53420000.

The previous prime is 133554991. The next prime is 133555007. The reversal of 133555000 is 555331.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133555007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 8356 + ... + 18355.

It is an arithmetic number, because the mean of its divisors is an integer number (7823277).

Almost surely, 2^133555000 is an apocalyptic number.

133555000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133555000 is an abundant number, since it is smaller than the sum of its proper divisors (179376080).

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

133555000 is an equidigital number, since it uses as much as digits as its factorization.

133555000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26737 (or 26718 counting only the distinct ones).

The product of its (nonzero) digits is 1125, while the sum is 22.

The square root of 133555000 is about 11556.5998459755. The cubic root of 133555000 is about 511.1559069469.

The spelling of 133555000 in words is "one hundred thirty-three million, five hundred fifty-five thousand".