43424213321 has 2 divisors, whose sum is σ = 43424213322. Its totient is φ = 43424213320.

The previous prime is 43424213317. The next prime is 43424213341. The reversal of 43424213321 is 12331242434.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23634757696 + 19789455625 = 153736^2 + 140675^2 .

It is a cyclic number.

It is not a de Polignac number, because 43424213321 - 2² = 43424213317 is a prime.

It is not a weakly prime, because it can be changed into another prime (43424213311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21712106660 + 21712106661.

It is an arithmetic number, because the mean of its divisors is an integer number (21712106661).

Almost surely, 2^43424213321 is an apocalyptic number.

It is an amenable number.

43424213321 is a deficient number, since it is larger than the sum of its proper divisors (1).

43424213321 is an equidigital number, since it uses as much as digits as its factorization.

43424213321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 29.

Adding to 43424213321 its reverse (12331242434), we get a palindrome (55755455755).

The spelling of 43424213321 in words is "forty-three billion, four hundred twenty-four million, two hundred thirteen thousand, three hundred twenty-one".