8212161 has 8 divisors (see below), whose sum is σ = 11525920. Its totient is φ = 5186592.

The previous prime is 8212157. The next prime is 8212163. The reversal of 8212161 is 1612128.

8212161 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 8212161 - 2² = 8212157 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (8212163) 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, 71980 + ... + 72093.

It is an arithmetic number, because the mean of its divisors is an integer number (1440740).

Almost surely, 2^8212161 is an apocalyptic number.

It is an amenable number.

8212161 is a deficient number, since it is larger than the sum of its proper divisors (3313759).

8212161 is a wasteful number, since it uses less digits than its factorization.

8212161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144095.

The product of its digits is 192, while the sum is 21.

The square root of 8212161 is about 2865.6868286678. The cubic root of 8212161 is about 201.7526053446.

Adding to 8212161 its reverse (1612128), we get a palindrome (9824289).

The spelling of 8212161 in words is "eight million, two hundred twelve thousand, one hundred sixty-one".