2143503221 has 8 divisors (see below), whose sum is σ = 2298892320. Its totient is φ = 1992371472.

The previous prime is 2143503211. The next prime is 2143503251. The reversal of 2143503221 is 1223053412.

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 2143503221 - 2²⁶ = 2076394357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143503211) 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 7 ways as a sum of consecutive naturals, for example, 1063295 + ... + 1065308.

It is an arithmetic number, because the mean of its divisors is an integer number (287361540).

Almost surely, 2^2143503221 is an apocalyptic number.

It is an amenable number.

2143503221 is a deficient number, since it is larger than the sum of its proper divisors (155389099).

2143503221 is a wasteful number, since it uses less digits than its factorization.

2143503221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2128675.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 2143503221 is about 46297.9829042260. The cubic root of 2143503221 is about 1289.3615455311.

Adding to 2143503221 its reverse (1223053412), we get a palindrome (3366556633).

The spelling of 2143503221 in words is "two billion, one hundred forty-three million, five hundred three thousand, two hundred twenty-one".