43243504243 has 2 divisors, whose sum is σ = 43243504244. Its totient is φ = 43243504242.

The previous prime is 43243504229. The next prime is 43243504247. The reversal of 43243504243 is 34240534234.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43243504243 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43243504199 and 43243504208.

It is not a weakly prime, because it can be changed into another prime (43243504247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21621752121 + 21621752122.

It is an arithmetic number, because the mean of its divisors is an integer number (21621752122).

Almost surely, 2^43243504243 is an apocalyptic number.

43243504243 is a deficient number, since it is larger than the sum of its proper divisors (1).

43243504243 is an equidigital number, since it uses as much as digits as its factorization.

43243504243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138240, while the sum is 34.

The spelling of 43243504243 in words is "forty-three billion, two hundred forty-three million, five hundred four thousand, two hundred forty-three".