43221343231 has 16 divisors (see below), whose sum is σ = 48257687808. Its totient is φ = 38369923200.

The previous prime is 43221343213. The next prime is 43221343237. The reversal of 43221343231 is 13234312234.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 43221343231 - 2²⁵ = 43187788799 is a prime.

It is a super-2 number, since 2×43221343231² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 43221343231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43221343237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3285990 + ... + 3299116.

It is an arithmetic number, because the mean of its divisors is an integer number (3016105488).

Almost surely, 2^43221343231 is an apocalyptic number.

43221343231 is a deficient number, since it is larger than the sum of its proper divisors (5036344577).

43221343231 is a wasteful number, since it uses less digits than its factorization.

43221343231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20142.

The product of its digits is 10368, while the sum is 28.

Adding to 43221343231 its reverse (13234312234), we get a palindrome (56455655465).

The spelling of 43221343231 in words is "forty-three billion, two hundred twenty-one million, three hundred forty-three thousand, two hundred thirty-one".