43231213243 has 2 divisors, whose sum is σ = 43231213244. Its totient is φ = 43231213242.

The previous prime is 43231213229. The next prime is 43231213261. The reversal of 43231213243 is 34231213234.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43231213243 is a prime.

It is not a weakly prime, because it can be changed into another prime (43231213343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21615606621 + 21615606622.

It is an arithmetic number, because the mean of its divisors is an integer number (21615606622).

Almost surely, 2^43231213243 is an apocalyptic number.

43231213243 is a deficient number, since it is larger than the sum of its proper divisors (1).

43231213243 is an equidigital number, since it uses as much as digits as its factorization.

43231213243 is an evil number, because the sum of its binary digits is even.

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

Adding to 43231213243 its reverse (34231213234), we get a palindrome (77462426477).

Subtracting from 43231213243 its reverse (34231213234), we obtain a palindrome (9000000009).

The spelling of 43231213243 in words is "forty-three billion, two hundred thirty-one million, two hundred thirteen thousand, two hundred forty-three".