133481481 has 32 divisors (see below), whose sum is σ = 209510400. Its totient is φ = 74018880.

The previous prime is 133481473. The next prime is 133481483. The reversal of 133481481 is 184184331.

It is not a de Polignac number, because 133481481 - 2³ = 133481473 is a prime.

It is a super-2 number, since 2×133481481² = 35634611539906722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (133481483) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 100540 + ... + 101858.

It is an arithmetic number, because the mean of its divisors is an integer number (6547200).

Almost surely, 2^133481481 is an apocalyptic number.

It is an amenable number.

133481481 is a deficient number, since it is larger than the sum of its proper divisors (76028919).

133481481 is a wasteful number, since it uses less digits than its factorization.

133481481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1469.

The product of its digits is 9216, while the sum is 33.

The square root of 133481481 is about 11553.4185849903. The cubic root of 133481481 is about 511.0620964847.

The spelling of 133481481 in words is "one hundred thirty-three million, four hundred eighty-one thousand, four hundred eighty-one".