43433444421 has 24 divisors (see below), whose sum is σ = 68910429120. Its totient is φ = 26238966336.

The previous prime is 43433444393. The next prime is 43433444447. The reversal of 43433444421 is 12444433434.

It is not a de Polignac number, because 43433444421 - 2¹³ = 43433436229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43433444491) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5517736 + ... + 5525601.

It is an arithmetic number, because the mean of its divisors is an integer number (2871267880).

Almost surely, 2^43433444421 is an apocalyptic number.

It is an amenable number.

43433444421 is a deficient number, since it is larger than the sum of its proper divisors (25476984699).

43433444421 is a wasteful number, since it uses less digits than its factorization.

43433444421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11043385 (or 11043382 counting only the distinct ones).

The product of its digits is 221184, while the sum is 36.

Adding to 43433444421 its reverse (12444433434), we get a palindrome (55877877855).

The spelling of 43433444421 in words is "forty-three billion, four hundred thirty-three million, four hundred forty-four thousand, four hundred twenty-one".