43261557043 has 2 divisors, whose sum is σ = 43261557044. Its totient is φ = 43261557042.

The previous prime is 43261557023. The next prime is 43261557091. The reversal of 43261557043 is 34075516234.

It is a happy number.

43261557043 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43261557043 - 2²¹ = 43259459891 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43261556987 and 43261557005.

It is not a weakly prime, because it can be changed into another prime (43261557023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21630778521 + 21630778522.

It is an arithmetic number, because the mean of its divisors is an integer number (21630778522).

Almost surely, 2^43261557043 is an apocalyptic number.

43261557043 is a deficient number, since it is larger than the sum of its proper divisors (1).

43261557043 is an equidigital number, since it uses as much as digits as its factorization.

43261557043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 302400, while the sum is 40.

The spelling of 43261557043 in words is "forty-three billion, two hundred sixty-one million, five hundred fifty-seven thousand, forty-three".