43123223231 has 8 divisors (see below), whose sum is σ = 47140120704. Its totient is φ = 39122426520.

The previous prime is 43123223219. The next prime is 43123223237. The reversal of 43123223231 is 13232232134.

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 a de Polignac number, because none of the positive numbers 2^k-43123223231 is a prime.

It is a super-2 number, since 2×43123223231² (a number of 22 digits) contains 22 as substring.

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 43123223231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43123223237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4019585 + ... + 4030298.

It is an arithmetic number, because the mean of its divisors is an integer number (5892515088).

Almost surely, 2^43123223231 is an apocalyptic number.

43123223231 is a deficient number, since it is larger than the sum of its proper divisors (4016897473).

43123223231 is a wasteful number, since it uses less digits than its factorization.

43123223231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8050381.

The product of its digits is 5184, while the sum is 26.

Adding to 43123223231 its reverse (13232232134), we get a palindrome (56355455365).

The spelling of 43123223231 in words is "forty-three billion, one hundred twenty-three million, two hundred twenty-three thousand, two hundred thirty-one".