43278287291 has 2 divisors, whose sum is σ = 43278287292. Its totient is φ = 43278287290.

The previous prime is 43278287231. The next prime is 43278287293. The reversal of 43278287291 is 19278287234.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43278287291 - 2¹⁴ = 43278270907 is a prime.

Together with 43278287293, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43278287293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21639143645 + 21639143646.

It is an arithmetic number, because the mean of its divisors is an integer number (21639143646).

Almost surely, 2^43278287291 is an apocalyptic number.

43278287291 is a deficient number, since it is larger than the sum of its proper divisors (1).

43278287291 is an equidigital number, since it uses as much as digits as its factorization.

43278287291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2709504, while the sum is 53.

The spelling of 43278287291 in words is "forty-three billion, two hundred seventy-eight million, two hundred eighty-seven thousand, two hundred ninety-one".