2171189156273 has 2 divisors, whose sum is σ = 2171189156274. Its totient is φ = 2171189156272.

The previous prime is 2171189156263. The next prime is 2171189156287. The reversal of 2171189156273 is 3726519811712.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2144549367184 + 26639789089 = 1464428^2 + 163217^2 .

It is a cyclic number.

It is not a de Polignac number, because 2171189156273 - 2¹⁰ = 2171189155249 is a prime.

It is not a weakly prime, because it can be changed into another prime (2171189156203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1085594578136 + 1085594578137.

It is an arithmetic number, because the mean of its divisors is an integer number (1085594578137).

Almost surely, 2^{2171189156273} is an apocalyptic number.

It is an amenable number.

2171189156273 is a deficient number, since it is larger than the sum of its proper divisors (1).

2171189156273 is an equidigital number, since it uses as much as digits as its factorization.

2171189156273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1270080, while the sum is 53.

The spelling of 2171189156273 in words is "two trillion, one hundred seventy-one billion, one hundred eighty-nine million, one hundred fifty-six thousand, two hundred seventy-three".