133863481 has 8 divisors (see below), whose sum is σ = 135491904. Its totient is φ = 132241200.

The previous prime is 133863467. The next prime is 133863503. The reversal of 133863481 is 184368331.

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 133863481 - 2¹⁵ = 133830713 is a prime.

It is a super-2 number, since 2×133863481² = 35838863090874722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 133863481.

It is not an unprimeable number, because it can be changed into a prime (133863451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54036 + ... + 56458.

It is an arithmetic number, because the mean of its divisors is an integer number (16936488).

Almost surely, 2^133863481 is an apocalyptic number.

It is an amenable number.

133863481 is a deficient number, since it is larger than the sum of its proper divisors (1628423).

133863481 is a wasteful number, since it uses less digits than its factorization.

133863481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3071.

The product of its digits is 41472, while the sum is 37.

The square root of 133863481 is about 11569.9386774520. The cubic root of 133863481 is about 511.5491547675.

It can be divided in two parts, 13 and 3863481, that multiplied together give a triangular number (50225253 = T₁₀₀₂₂).

The spelling of 133863481 in words is "one hundred thirty-three million, eight hundred sixty-three thousand, four hundred eighty-one".