163903522171 has 2 divisors, whose sum is σ = 163903522172. Its totient is φ = 163903522170.

The previous prime is 163903522157. The next prime is 163903522177. The reversal of 163903522171 is 171225309361.

163903522171 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 an emirp because it is prime and its reverse (171225309361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 163903522171 - 2¹³ = 163903513979 is a prime.

It is not a weakly prime, because it can be changed into another prime (163903522177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81951761085 + 81951761086.

It is an arithmetic number, because the mean of its divisors is an integer number (81951761086).

Almost surely, 2^163903522171 is an apocalyptic number.

163903522171 is a deficient number, since it is larger than the sum of its proper divisors (1).

163903522171 is an equidigital number, since it uses as much as digits as its factorization.

163903522171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 40.

The spelling of 163903522171 in words is "one hundred sixty-three billion, nine hundred three million, five hundred twenty-two thousand, one hundred seventy-one".