43354220491 has 2 divisors, whose sum is σ = 43354220492. Its totient is φ = 43354220490.

The previous prime is 43354220447. The next prime is 43354220521. The reversal of 43354220491 is 19402245334.

43354220491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43354220491 - 2⁷ = 43354220363 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43354220491.

It is not a weakly prime, because it can be changed into another prime (43354223491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21677110245 + 21677110246.

It is an arithmetic number, because the mean of its divisors is an integer number (21677110246).

Almost surely, 2^43354220491 is an apocalyptic number.

43354220491 is a deficient number, since it is larger than the sum of its proper divisors (1).

43354220491 is an equidigital number, since it uses as much as digits as its factorization.

43354220491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 37.

The spelling of 43354220491 in words is "forty-three billion, three hundred fifty-four million, two hundred twenty thousand, four hundred ninety-one".