43431020505359 has 2 divisors, whose sum is σ = 43431020505360. Its totient is φ = 43431020505358.

The previous prime is 43431020505281. The next prime is 43431020505461. The reversal of 43431020505359 is 95350502013434.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43431020505359 - 2⁴⁰ = 42331508877583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43431020205359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21715510252679 + 21715510252680.

It is an arithmetic number, because the mean of its divisors is an integer number (21715510252680).

Almost surely, 2^{43431020505359} is an apocalyptic number.

43431020505359 is a deficient number, since it is larger than the sum of its proper divisors (1).

43431020505359 is an equidigital number, since it uses as much as digits as its factorization.

43431020505359 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972000, while the sum is 44.

The spelling of 43431020505359 in words is "forty-three trillion, four hundred thirty-one billion, twenty million, five hundred five thousand, three hundred fifty-nine".