43321331243087 has 2 divisors, whose sum is σ = 43321331243088. Its totient is φ = 43321331243086.

The previous prime is 43321331243081. The next prime is 43321331243219. The reversal of 43321331243087 is 78034213312334.

43321331243087 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43321331243087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43321331243081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21660665621543 + 21660665621544.

It is an arithmetic number, because the mean of its divisors is an integer number (21660665621544).

Almost surely, 2^{43321331243087} is an apocalyptic number.

43321331243087 is a deficient number, since it is larger than the sum of its proper divisors (1).

43321331243087 is an equidigital number, since it uses as much as digits as its factorization.

43321331243087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 870912, while the sum is 44.

The spelling of 43321331243087 in words is "forty-three trillion, three hundred twenty-one billion, three hundred thirty-one million, two hundred forty-three thousand, eighty-seven".