211070161 has 2 divisors, whose sum is σ = 211070162. Its totient is φ = 211070160.

The previous prime is 211070129. The next prime is 211070191. The reversal of 211070161 is 161070112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 169390225 + 41679936 = 13015^2 + 6456^2 .

It is a cyclic number.

It is not a de Polignac number, because 211070161 - 2⁵ = 211070129 is a prime.

It is a super-2 number, since 2×211070161² = 89101225729131842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211070191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105535080 + 105535081.

It is an arithmetic number, because the mean of its divisors is an integer number (105535081).

Almost surely, 2^211070161 is an apocalyptic number.

It is an amenable number.

211070161 is a deficient number, since it is larger than the sum of its proper divisors (1).

211070161 is an equidigital number, since it uses as much as digits as its factorization.

211070161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84, while the sum is 19.

The square root of 211070161 is about 14528.2538868234. The cubic root of 211070161 is about 595.4001601649.

The spelling of 211070161 in words is "two hundred eleven million, seventy thousand, one hundred sixty-one".