43321450321 has 2 divisors, whose sum is σ = 43321450322. Its totient is φ = 43321450320.

The previous prime is 43321450307. The next prime is 43321450349. The reversal of 43321450321 is 12305412334.

It is a happy number.

It is an a-pointer prime, because the next prime (43321450349) can be obtained adding 43321450321 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24984228096 + 18337222225 = 158064^2 + 135415^2 .

It is a cyclic number.

It is not a de Polignac number, because 43321450321 - 2³⁵ = 8961711953 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43321450321.

It is not a weakly prime, because it can be changed into another prime (43321450721) 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, 21660725160 + 21660725161.

It is an arithmetic number, because the mean of its divisors is an integer number (21660725161).

Almost surely, 2^43321450321 is an apocalyptic number.

It is an amenable number.

43321450321 is a deficient number, since it is larger than the sum of its proper divisors (1).

43321450321 is an equidigital number, since it uses as much as digits as its factorization.

43321450321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 43321450321 its reverse (12305412334), we get a palindrome (55626862655).

The spelling of 43321450321 in words is "forty-three billion, three hundred twenty-one million, four hundred fifty thousand, three hundred twenty-one".