2171246971 has 2 divisors, whose sum is σ = 2171246972. Its totient is φ = 2171246970.

The previous prime is 2171246951. The next prime is 2171246999. The reversal of 2171246971 is 1796421712.

2171246971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2171246971 - 2⁵ = 2171246939 is a prime.

It is not a weakly prime, because it can be changed into another prime (2171246911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1085623485 + 1085623486.

It is an arithmetic number, because the mean of its divisors is an integer number (1085623486).

Almost surely, 2^2171246971 is an apocalyptic number.

2171246971 is a deficient number, since it is larger than the sum of its proper divisors (1).

2171246971 is an equidigital number, since it uses as much as digits as its factorization.

2171246971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 40.

The square root of 2171246971 is about 46596.6411986959. The cubic root of 2171246971 is about 1294.9005297201.

The spelling of 2171246971 in words is "two billion, one hundred seventy-one million, two hundred forty-six thousand, nine hundred seventy-one".