43221041 has 2 divisors, whose sum is σ = 43221042. Its totient is φ = 43221040.

The previous prime is 43221019. The next prime is 43221043. The reversal of 43221041 is 14012234.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38688400 + 4532641 = 6220^2 + 2129^2 .

It is a cyclic number.

It is not a de Polignac number, because 43221041 - 2¹⁰ = 43220017 is a prime.

Together with 43221043, 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 (43221043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21610520 + 21610521.

It is an arithmetic number, because the mean of its divisors is an integer number (21610521).

Almost surely, 2^43221041 is an apocalyptic number.

It is an amenable number.

43221041 is a deficient number, since it is larger than the sum of its proper divisors (1).

43221041 is an equidigital number, since it uses as much as digits as its factorization.

43221041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 43221041 is about 6574.2711383088. The cubic root of 43221041 is about 350.9390862441.

Adding to 43221041 its reverse (14012234), we get a palindrome (57233275).

The spelling of 43221041 in words is "forty-three million, two hundred twenty-one thousand, forty-one".