43331323231 has 6 divisors (see below), whose sum is σ = 50405825040. Its totient is φ = 37141134156.

The previous prime is 43331323223. The next prime is 43331323237. The reversal of 43331323231 is 13232313334.

It is not a de Polignac number, because 43331323231 - 2³ = 43331323223 is a prime.

It is a super-2 number, since 2×43331323231² (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 43331323231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43331323237) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 442156311 + ... + 442156408.

It is an arithmetic number, because the mean of its divisors is an integer number (8400970840).

Almost surely, 2^43331323231 is an apocalyptic number.

43331323231 is a deficient number, since it is larger than the sum of its proper divisors (7074501809).

43331323231 is an equidigital number, since it uses as much as digits as its factorization.

43331323231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884312733 (or 884312726 counting only the distinct ones).

The product of its digits is 11664, while the sum is 28.

Adding to 43331323231 its reverse (13232313334), we get a palindrome (56563636565).

The spelling of 43331323231 in words is "forty-three billion, three hundred thirty-one million, three hundred twenty-three thousand, two hundred thirty-one".