43543321403 has 4 divisors (see below), whose sum is σ = 43950268440. Its totient is φ = 43136374368.

The previous prime is 43543321391. The next prime is 43543321411. The reversal of 43543321403 is 30412334534.

43543321403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 43543321403 - 2⁸ = 43543321147 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 43543321403.

It is not an unprimeable number, because it can be changed into a prime (43543321483) 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, 203473358 + ... + 203473571.

It is an arithmetic number, because the mean of its divisors is an integer number (10987567110).

Almost surely, 2^43543321403 is an apocalyptic number.

43543321403 is a deficient number, since it is larger than the sum of its proper divisors (406947037).

43543321403 is a wasteful number, since it uses less digits than its factorization.

43543321403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406947036.

The product of its (nonzero) digits is 51840, while the sum is 32.

Adding to 43543321403 its reverse (30412334534), we get a palindrome (73955655937).

The spelling of 43543321403 in words is "forty-three billion, five hundred forty-three million, three hundred twenty-one thousand, four hundred three".