161000211 has 8 divisors (see below), whose sum is σ = 214732944. Its totient is φ = 107300480.

The previous prime is 161000197. The next prime is 161000219. The reversal of 161000211 is 112000161.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161000211 - 2¹⁹ = 160475923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161000219) 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 in 7 ways as a sum of consecutive naturals, for example, 7351 + ... + 19391.

It is an arithmetic number, because the mean of its divisors is an integer number (26841618).

Almost surely, 2^161000211 is an apocalyptic number.

161000211 is a deficient number, since it is larger than the sum of its proper divisors (53732733).

161000211 is a wasteful number, since it uses less digits than its factorization.

161000211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16501.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 161000211 is about 12688.5858550116. The cubic root of 161000211 is about 544.0124201947.

Adding to 161000211 its reverse (112000161), we get a palindrome (273000372).

Subtracting from 161000211 its reverse (112000161), we obtain a triangular number (49000050 = T₉₈₉₉).

The spelling of 161000211 in words is "one hundred sixty-one million, two hundred eleven", and thus it is an aban number.