133803381 has 8 divisors (see below), whose sum is σ = 178778880. Its totient is φ = 89015072.

The previous prime is 133803367. The next prime is 133803389. The reversal of 133803381 is 183308331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133803381 - 2⁵ = 133803349 is a prime.

It is a super-2 number, since 2×133803381² = 35806689534062322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133803389) by changing a digit.

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, 45120 + ... + 47993.

It is an arithmetic number, because the mean of its divisors is an integer number (22347360).

Almost surely, 2^133803381 is an apocalyptic number.

It is an amenable number.

133803381 is a deficient number, since it is larger than the sum of its proper divisors (44975499).

133803381 is an equidigital number, since it uses as much as digits as its factorization.

133803381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93595.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 133803381 is about 11567.3411378761. The cubic root of 133803381 is about 511.4725874415.

It can be divided in two parts, 13380 and 3381, that added together give a palindrome (16761).

The spelling of 133803381 in words is "one hundred thirty-three million, eight hundred three thousand, three hundred eighty-one".