43431243413 has 4 divisors (see below), whose sum is σ = 45319558368. Its totient is φ = 41542928460.

The previous prime is 43431243403. The next prime is 43431243439. The reversal of 43431243413 is 31434213434.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 43431243413 - 2¹⁶ = 43431177877 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 43431243413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43431243403) 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, 944157443 + ... + 944157488.

It is an arithmetic number, because the mean of its divisors is an integer number (11329889592).

Almost surely, 2^43431243413 is an apocalyptic number.

It is an amenable number.

43431243413 is a deficient number, since it is larger than the sum of its proper divisors (1888314955).

43431243413 is a wasteful number, since it uses less digits than its factorization.

43431243413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1888314954.

The product of its digits is 41472, while the sum is 32.

Adding to 43431243413 its reverse (31434213434), we get a palindrome (74865456847).

The spelling of 43431243413 in words is "forty-three billion, four hundred thirty-one million, two hundred forty-three thousand, four hundred thirteen".