2197078171 has 2 divisors, whose sum is σ = 2197078172. Its totient is φ = 2197078170.

The previous prime is 2197078123. The next prime is 2197078199. The reversal of 2197078171 is 1718707912.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2197078171 is a prime.

It is not a weakly prime, because it can be changed into another prime (2197078771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1098539085 + 1098539086.

It is an arithmetic number, because the mean of its divisors is an integer number (1098539086).

Almost surely, 2^2197078171 is an apocalyptic number.

2197078171 is a deficient number, since it is larger than the sum of its proper divisors (1).

2197078171 is an equidigital number, since it uses as much as digits as its factorization.

2197078171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 49392, while the sum is 43.

The square root of 2197078171 is about 46873.0004480191. Note that the first 3 decimals coincide. The cubic root of 2197078171 is about 1300.0154181603.

The spelling of 2197078171 in words is "two billion, one hundred ninety-seven million, seventy-eight thousand, one hundred seventy-one".