105443321 has 2 divisors, whose sum is σ = 105443322. Its totient is φ = 105443320.

The previous prime is 105443311. The next prime is 105443323. The reversal of 105443321 is 123344501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73960000 + 31483321 = 8600^2 + 5611^2 .

It is a cyclic number.

It is not a de Polignac number, because 105443321 - 2¹⁸ = 105181177 is a prime.

It is a super-3 number, since 3×105443321³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 105443323, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (105443323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52721660 + 52721661.

It is an arithmetic number, because the mean of its divisors is an integer number (52721661).

Almost surely, 2^105443321 is an apocalyptic number.

It is an amenable number.

105443321 is a deficient number, since it is larger than the sum of its proper divisors (1).

105443321 is an equidigital number, since it uses as much as digits as its factorization.

105443321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 105443321 is about 10268.5598308624. The cubic root of 105443321 is about 472.4324190645.

Adding to 105443321 its reverse (123344501), we get a palindrome (228787822).

The spelling of 105443321 in words is "one hundred five million, four hundred forty-three thousand, three hundred twenty-one".