43865242492321 has 2 divisors, whose sum is σ = 43865242492322. Its totient is φ = 43865242492320.

The previous prime is 43865242492259. The next prime is 43865242492363. The reversal of 43865242492321 is 12329424256834.

43865242492321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25094729567296 + 18770512925025 = 5009464^2 + 4332495^2 .

It is a cyclic number.

It is not a de Polignac number, because 43865242492321 - 2⁷ = 43865242492193 is a prime.

It is not a weakly prime, because it can be changed into another prime (43865242492021) 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, 21932621246160 + 21932621246161.

It is an arithmetic number, because the mean of its divisors is an integer number (21932621246161).

Almost surely, 2^{43865242492321} is an apocalyptic number.

It is an amenable number.

43865242492321 is a deficient number, since it is larger than the sum of its proper divisors (1).

43865242492321 is an equidigital number, since it uses as much as digits as its factorization.

43865242492321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19906560, while the sum is 55.

The spelling of 43865242492321 in words is "forty-three trillion, eight hundred sixty-five billion, two hundred forty-two million, four hundred ninety-two thousand, three hundred twenty-one".