2143445221 has 8 divisors (see below), whose sum is σ = 2270099520. Its totient is φ = 2016854208.

The previous prime is 2143445219. The next prime is 2143445237. The reversal of 2143445221 is 1225443412.

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 2143445221 - 2¹ = 2143445219 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2143445221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143445201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66070 + ... + 93016.

It is an arithmetic number, because the mean of its divisors is an integer number (283762440).

Almost surely, 2^2143445221 is an apocalyptic number.

It is an amenable number.

2143445221 is a deficient number, since it is larger than the sum of its proper divisors (126654299).

2143445221 is a wasteful number, since it uses less digits than its factorization.

2143445221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31643.

The product of its digits is 7680, while the sum is 28.

The square root of 2143445221 is about 46297.3565228081. The cubic root of 2143445221 is about 1289.3499160261.

Adding to 2143445221 its reverse (1225443412), we get a palindrome (3368888633).

The spelling of 2143445221 in words is "two billion, one hundred forty-three million, four hundred forty-five thousand, two hundred twenty-one".