43026312491 has 2 divisors, whose sum is σ = 43026312492. Its totient is φ = 43026312490.

The previous prime is 43026312419. The next prime is 43026312547. The reversal of 43026312491 is 19421362034.

Together with previous prime (43026312419) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43026312491 - 2³⁴ = 25846443307 is a prime.

It is not a weakly prime, because it can be changed into another prime (43026311491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21513156245 + 21513156246.

It is an arithmetic number, because the mean of its divisors is an integer number (21513156246).

Almost surely, 2^43026312491 is an apocalyptic number.

43026312491 is a deficient number, since it is larger than the sum of its proper divisors (1).

43026312491 is an equidigital number, since it uses as much as digits as its factorization.

43026312491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 35.

The spelling of 43026312491 in words is "forty-three billion, twenty-six million, three hundred twelve thousand, four hundred ninety-one".