2144203221 has 16 divisors (see below), whose sum is σ = 3012212736. Its totient is φ = 1354038576.

The previous prime is 2144203177. The next prime is 2144203261. The reversal of 2144203221 is 1223024412.

It is not a de Polignac number, because 2144203221 - 2⁷ = 2144203093 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2144203261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143745 + ... + 157958.

It is an arithmetic number, because the mean of its divisors is an integer number (188263296).

Almost surely, 2^2144203221 is an apocalyptic number.

It is an amenable number.

2144203221 is a deficient number, since it is larger than the sum of its proper divisors (868009515).

2144203221 is a wasteful number, since it uses less digits than its factorization.

2144203221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301832.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 2144203221 is about 46305.5420117290. The cubic root of 2144203221 is about 1289.5018850841.

Adding to 2144203221 its reverse (1223024412), we get a palindrome (3367227633).

The spelling of 2144203221 in words is "two billion, one hundred forty-four million, two hundred three thousand, two hundred twenty-one".