2161227 has 16 divisors (see below), whose sum is σ = 3151872. Its totient is φ = 1311360.

The previous prime is 2161213. The next prime is 2161253. The reversal of 2161227 is 7221612.

2161227 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2161227 - 2⁶ = 2161163 is a prime.

2161227 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2161297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 898 + ... + 2264.

It is an arithmetic number, because the mean of its divisors is an integer number (196992).

2^2161227 is an apocalyptic number.

2161227 is a deficient number, since it is larger than the sum of its proper divisors (990645).

2161227 is a wasteful number, since it uses less digits than its factorization.

2161227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1418.

The product of its digits is 336, while the sum is 21.

The square root of 2161227 is about 1470.1112202823. Note that the first 3 decimals coincide. The cubic root of 2161227 is about 129.2905535405.

Adding to 2161227 its reverse (7221612), we get a palindrome (9382839).

The spelling of 2161227 in words is "two million, one hundred sixty-one thousand, two hundred twenty-seven".