47440217971 has 2 divisors, whose sum is σ = 47440217972. Its totient is φ = 47440217970.

The previous prime is 47440217947. The next prime is 47440217987. The reversal of 47440217971 is 17971204474.

47440217971 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 47440217971 - 2⁷ = 47440217843 is a prime.

It is a super-2 number, since 2×47440217971² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (47440217911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23720108985 + 23720108986.

It is an arithmetic number, because the mean of its divisors is an integer number (23720108986).

Almost surely, 2^47440217971 is an apocalyptic number.

47440217971 is a deficient number, since it is larger than the sum of its proper divisors (1).

47440217971 is an equidigital number, since it uses as much as digits as its factorization.

47440217971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 395136, while the sum is 46.

The spelling of 47440217971 in words is "forty-seven billion, four hundred forty million, two hundred seventeen thousand, nine hundred seventy-one".