43431020511043 has 4 divisors (see below), whose sum is σ = 47379295102968. Its totient is φ = 39482745919120.

The previous prime is 43431020510993. The next prime is 43431020511059. The reversal of 43431020511043 is 34011502013434.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43431020511043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43431020510996 and 43431020511014.

It is not an unprimeable number, because it can be changed into a prime (43431020511643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1974137295946 + ... + 1974137295967.

It is an arithmetic number, because the mean of its divisors is an integer number (11844823775742).

Almost surely, 2^{43431020511043} is an apocalyptic number.

43431020511043 is a deficient number, since it is larger than the sum of its proper divisors (3948274591925).

43431020511043 is a wasteful number, since it uses less digits than its factorization.

43431020511043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3948274591924.

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 43431020511043 its reverse (34011502013434), we get a palindrome (77442522524477).

The spelling of 43431020511043 in words is "forty-three trillion, four hundred thirty-one billion, twenty million, five hundred eleven thousand, forty-three".