2143440221 has 16 divisors (see below), whose sum is σ = 2366267904. Its totient is φ = 1929057984.

The previous prime is 2143440193. The next prime is 2143440227. The reversal of 2143440221 is 1220443412.

It is a cyclic number.

It is not a de Polignac number, because 2143440221 - 2¹⁴ = 2143423837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143440227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 336155 + ... + 342471.

It is an arithmetic number, because the mean of its divisors is an integer number (147891744).

Almost surely, 2^2143440221 is an apocalyptic number.

It is an amenable number.

2143440221 is a deficient number, since it is larger than the sum of its proper divisors (222827683).

2143440221 is a wasteful number, since it uses less digits than its factorization.

2143440221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6980.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 2143440221 is about 46297.3025240132. The cubic root of 2143440221 is about 1289.3489134728.

Adding to 2143440221 its reverse (1220443412), we get a palindrome (3363883633).

The spelling of 2143440221 in words is "two billion, one hundred forty-three million, four hundred forty thousand, two hundred twenty-one".