43442315009 has 2 divisors, whose sum is σ = 43442315010. Its totient is φ = 43442315008.

The previous prime is 43442315003. The next prime is 43442315023. The reversal of 43442315009 is 90051324434.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35790964225 + 7651350784 = 189185^2 + 87472^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43442315009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43442315009.

It is not a weakly prime, because it can be changed into another prime (43442315003) 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, 21721157504 + 21721157505.

It is an arithmetic number, because the mean of its divisors is an integer number (21721157505).

Almost surely, 2^43442315009 is an apocalyptic number.

It is an amenable number.

43442315009 is a deficient number, since it is larger than the sum of its proper divisors (1).

43442315009 is an equidigital number, since it uses as much as digits as its factorization.

43442315009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 35.

The spelling of 43442315009 in words is "forty-three billion, four hundred forty-two million, three hundred fifteen thousand, nine".