43149218898391 has 2 divisors, whose sum is σ = 43149218898392. Its totient is φ = 43149218898390.

The previous prime is 43149218898229. The next prime is 43149218898421. The reversal of 43149218898391 is 19389881294134.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43149218898391 - 2¹⁹ = 43149218374103 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43149218898391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43149218898991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21574609449195 + 21574609449196.

It is an arithmetic number, because the mean of its divisors is an integer number (21574609449196).

Almost surely, 2^{43149218898391} is an apocalyptic number.

43149218898391 is a deficient number, since it is larger than the sum of its proper divisors (1).

43149218898391 is an equidigital number, since it uses as much as digits as its factorization.

43149218898391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 107495424, while the sum is 70.

The spelling of 43149218898391 in words is "forty-three trillion, one hundred forty-nine billion, two hundred eighteen million, eight hundred ninety-eight thousand, three hundred ninety-one".