211466161 has 2 divisors, whose sum is σ = 211466162. Its totient is φ = 211466160.

The previous prime is 211466149. The next prime is 211466191. The reversal of 211466161 is 161664112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142659136 + 68807025 = 11944^2 + 8295^2 .

It is a cyclic number.

It is not a de Polignac number, because 211466161 - 2¹⁵ = 211433393 is a prime.

It is not a weakly prime, because it can be changed into another prime (211466141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105733080 + 105733081.

It is an arithmetic number, because the mean of its divisors is an integer number (105733081).

Almost surely, 2^211466161 is an apocalyptic number.

It is an amenable number.

211466161 is a deficient number, since it is larger than the sum of its proper divisors (1).

211466161 is an equidigital number, since it uses as much as digits as its factorization.

211466161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 28.

The square root of 211466161 is about 14541.8761169252. The cubic root of 211466161 is about 595.7722815544.

The spelling of 211466161 in words is "two hundred eleven million, four hundred sixty-six thousand, one hundred sixty-one".