2144221 has 8 divisors (see below), whose sum is σ = 2280960. Its totient is φ = 2011152.

The previous prime is 2144213. The next prime is 2144243. The reversal of 2144221 is 1224412.

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 2144221 - 2³ = 2144213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2144195 and 2144204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2144251) 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, 340 + ... + 2098.

It is an arithmetic number, because the mean of its divisors is an integer number (285120).

2^2144221 is an apocalyptic number.

It is an amenable number.

2144221 is a deficient number, since it is larger than the sum of its proper divisors (136739).

2144221 is a wasteful number, since it uses less digits than its factorization.

2144221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1835.

The product of its digits is 128, while the sum is 16.

The square root of 2144221 is about 1464.3158812224. The cubic root of 2144221 is about 128.9505449110.

Adding to 2144221 its reverse (1224412), we get a palindrome (3368633).

The spelling of 2144221 in words is "two million, one hundred forty-four thousand, two hundred twenty-one".