43381 has 8 divisors (see below), whose sum is σ = 48384. Its totient is φ = 38640.

The previous prime is 43331. The next prime is 43391. The reversal of 43381 is 18334.

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 43381 - 2¹¹ = 41333 is a prime.

It is a super-2 number, since 2×43381² = 3763822322, which contains 22 as substring.

It is a Duffinian number.

43381 is a lucky number.

It is a nialpdrome in base 15 and base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43321) 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, 576 + ... + 646.

It is an arithmetic number, because the mean of its divisors is an integer number (6048).

2⁴³³⁸¹ is an apocalyptic number.

It is an amenable number.

43381 is a deficient number, since it is larger than the sum of its proper divisors (5003).

43381 is a wasteful number, since it uses less digits than its factorization.

43381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131.

The product of its digits is 288, while the sum is 19.

The square root of 43381 is about 208.2810601087. The cubic root of 43381 is about 35.1371489490.

It can be divided in two parts, 43 and 381, that added together give a palindrome (424).

The spelling of 43381 in words is "forty-three thousand, three hundred eighty-one".