43331 has 2 divisors, whose sum is σ = 43332. Its totient is φ = 43330.

The previous prime is 43321. The next prime is 43391. The reversal of 43331 is 13334.

It is a happy number.

43331 is nontrivially palindromic in base 14.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43331 - 2¹⁰ = 42307 is a prime.

It is a super-2 number, since 2×43331² = 3755151122, which contains 22 as substring.

It is a Chen prime.

It is a nialpdrome in base 10 and base 16.

It is not a weakly prime, because it can be changed into another prime (43321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21665 + 21666.

It is an arithmetic number, because the mean of its divisors is an integer number (21666).

2⁴³³³¹ is an apocalyptic number.

43331 is a deficient number, since it is larger than the sum of its proper divisors (1).

43331 is an equidigital number, since it uses as much as digits as its factorization.

43331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108, while the sum is 14.

The square root of 43331 is about 208.1609953858. The cubic root of 43331 is about 35.1236443206.

Adding to 43331 its reverse (13334), we get a palindrome (56665).

It can be divided in two parts, 4333 and 1, that added together give a palindrome (4334).

The spelling of 43331 in words is "forty-three thousand, three hundred thirty-one".