161016211 has 4 divisors (see below), whose sum is σ = 161086000. Its totient is φ = 160946424.

The previous prime is 161016199. The next prime is 161016221. The reversal of 161016211 is 112610161.

161016211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 112610161 = 29 ⋅3883109.

It is a cyclic number.

It is not a de Polignac number, because 161016211 - 2²⁷ = 26798483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161016221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31311 + ... + 36088.

It is an arithmetic number, because the mean of its divisors is an integer number (40271500).

Almost surely, 2^161016211 is an apocalyptic number.

161016211 is a deficient number, since it is larger than the sum of its proper divisors (69789).

161016211 is an equidigital number, since it uses as much as digits as its factorization.

161016211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69788.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 161016211 is about 12689.2163272599. The cubic root of 161016211 is about 544.0304406895.

Adding to 161016211 its reverse (112610161), we get a palindrome (273626372).

The spelling of 161016211 in words is "one hundred sixty-one million, sixteen thousand, two hundred eleven".