43443213231 has 8 divisors (see below), whose sum is σ = 63190128384. Its totient is φ = 26329220120.

The previous prime is 43443213221. The next prime is 43443213251. The reversal of 43443213231 is 13231234434.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 43443213231 - 2⁷ = 43443213103 is a prime.

It is a super-2 number, since 2×43443213231² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43443213221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 658230471 + ... + 658230536.

It is an arithmetic number, because the mean of its divisors is an integer number (7898766048).

Almost surely, 2^43443213231 is an apocalyptic number.

43443213231 is a deficient number, since it is larger than the sum of its proper divisors (19746915153).

43443213231 is a wasteful number, since it uses less digits than its factorization.

43443213231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1316461021.

The product of its digits is 20736, while the sum is 30.

Adding to 43443213231 its reverse (13231234434), we get a palindrome (56674447665).

The spelling of 43443213231 in words is "forty-three billion, four hundred forty-three million, two hundred thirteen thousand, two hundred thirty-one".