43541321 has 2 divisors, whose sum is σ = 43541322. Its totient is φ = 43541320.

The previous prime is 43541297. The next prime is 43541339. The reversal of 43541321 is 12314534.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23863225 + 19678096 = 4885^2 + 4436^2 .

It is a cyclic number.

It is not a de Polignac number, because 43541321 - 2²² = 39347017 is a prime.

It is not a weakly prime, because it can be changed into another prime (43541021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21770660 + 21770661.

It is an arithmetic number, because the mean of its divisors is an integer number (21770661).

Almost surely, 2^43541321 is an apocalyptic number.

It is an amenable number.

43541321 is a deficient number, since it is larger than the sum of its proper divisors (1).

43541321 is an equidigital number, since it uses as much as digits as its factorization.

43541321 is an odious number, because the sum of its binary digits is odd.

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

The square root of 43541321 is about 6598.5847725099. The cubic root of 43541321 is about 351.8038060647.

Adding to 43541321 its reverse (12314534), we get a palindrome (55855855).

The spelling of 43541321 in words is "forty-three million, five hundred forty-one thousand, three hundred twenty-one".