43431020505223 has 4 divisors (see below), whose sum is σ = 46771868236408. Its totient is φ = 40090172774040.

The previous prime is 43431020505221. The next prime is 43431020505281. The reversal of 43431020505223 is 32250502013434.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 43431020505223 - 2¹ = 43431020505221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43431020505221) 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 in 3 ways as a sum of consecutive naturals, for example, 1670423865573 + ... + 1670423865598.

It is an arithmetic number, because the mean of its divisors is an integer number (11692967059102).

Almost surely, 2^{43431020505223} is an apocalyptic number.

43431020505223 is a deficient number, since it is larger than the sum of its proper divisors (3340847731185).

43431020505223 is a wasteful number, since it uses less digits than its factorization.

43431020505223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3340847731184.

The product of its (nonzero) digits is 86400, while the sum is 34.

Adding to 43431020505223 its reverse (32250502013434), we get a palindrome (75681522518657).

The spelling of 43431020505223 in words is "forty-three trillion, four hundred thirty-one billion, twenty million, five hundred five thousand, two hundred twenty-three".