133481280 has 112 divisors (see below), whose sum is σ = 448787520. Its totient is φ = 33497088.

The previous prime is 133481279. The next prime is 133481317. The reversal of 133481280 is 82184331.

It is a super-2 number, since 2×133481280² = 35634504220876800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12231 + ... + 20409.

Almost surely, 2^133481280 is an apocalyptic number.

133481280 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 133481280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (224393760).

133481280 is an abundant number, since it is smaller than the sum of its proper divisors (315306240).

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

133481280 is a wasteful number, since it uses less digits than its factorization.

133481280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8216 (or 8206 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 133481280 is about 11553.4098862630. The cubic root of 133481280 is about 511.0618399609.

The spelling of 133481280 in words is "one hundred thirty-three million, four hundred eighty-one thousand, two hundred eighty".