43317719971 has 2 divisors, whose sum is σ = 43317719972. Its totient is φ = 43317719970.

The previous prime is 43317719957. The next prime is 43317720023. The reversal of 43317719971 is 17991771334.

It is an a-pointer prime, because the next prime (43317720023) can be obtained adding 43317719971 to its sum of digits (52).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43317719971 - 2²³ = 43309331363 is a prime.

It is not a weakly prime, because it can be changed into another prime (43317710971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21658859985 + 21658859986.

It is an arithmetic number, because the mean of its divisors is an integer number (21658859986).

Almost surely, 2^43317719971 is an apocalyptic number.

43317719971 is a deficient number, since it is larger than the sum of its proper divisors (1).

43317719971 is an equidigital number, since it uses as much as digits as its factorization.

43317719971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1000188, while the sum is 52.

The spelling of 43317719971 in words is "forty-three billion, three hundred seventeen million, seven hundred nineteen thousand, nine hundred seventy-one".