43122431509 has 2 divisors, whose sum is σ = 43122431510. Its totient is φ = 43122431508.

The previous prime is 43122431507. The next prime is 43122431531. The reversal of 43122431509 is 90513422134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33570301284 + 9552130225 = 183222^2 + 97735^2 .

It is a cyclic number.

It is not a de Polignac number, because 43122431509 - 2¹ = 43122431507 is a prime.

Together with 43122431507, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43122431501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21561215754 + 21561215755.

It is an arithmetic number, because the mean of its divisors is an integer number (21561215755).

Almost surely, 2^43122431509 is an apocalyptic number.

It is an amenable number.

43122431509 is a deficient number, since it is larger than the sum of its proper divisors (1).

43122431509 is an equidigital number, since it uses as much as digits as its factorization.

43122431509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 34.

The spelling of 43122431509 in words is "forty-three billion, one hundred twenty-two million, four hundred thirty-one thousand, five hundred nine".