133155120 has 80 divisors (see below), whose sum is σ = 471755520. Its totient is φ = 30435072.

The previous prime is 133155109. The next prime is 133155149. The reversal of 133155120 is 21551331.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37950 + ... + 41309.

It is an arithmetic number, because the mean of its divisors is an integer number (5896944).

Almost surely, 2^133155120 is an apocalyptic number.

133155120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133155120 is an abundant number, since it is smaller than the sum of its proper divisors (338600400).

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

133155120 is a wasteful number, since it uses less digits than its factorization.

133155120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79282 (or 79276 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 133155120 is about 11539.2859397798. The cubic root of 133155120 is about 510.6452425149.

The spelling of 133155120 in words is "one hundred thirty-three million, one hundred fifty-five thousand, one hundred twenty".