2216172161 has 8 divisors (see below), whose sum is σ = 2535630720. Its totient is φ = 1897429248.

The previous prime is 2216172149. The next prime is 2216172163. The reversal of 2216172161 is 1612716122.

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 2216172161 - 2¹⁰ = 2216171137 is a prime.

It is a super-2 number, since 2×2216172161² = 9822838094382819842, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2216172163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172256 + ... + 184673.

It is an arithmetic number, because the mean of its divisors is an integer number (316953840).

Almost surely, 2^2216172161 is an apocalyptic number.

It is an amenable number.

2216172161 is a deficient number, since it is larger than the sum of its proper divisors (319458559).

2216172161 is an equidigital number, since it uses as much as digits as its factorization.

2216172161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357823.

The product of its digits is 2016, while the sum is 29.

The square root of 2216172161 is about 47076.2377532445. The cubic root of 2216172161 is about 1303.7705445895.

Adding to 2216172161 its reverse (1612716122), we get a palindrome (3828888283).

The spelling of 2216172161 in words is "two billion, two hundred sixteen million, one hundred seventy-two thousand, one hundred sixty-one".