2143445321 has 8 divisors (see below), whose sum is σ = 2150748288. Its totient is φ = 2136154000.

The previous prime is 2143445243. The next prime is 2143445327. The reversal of 2143445321 is 1235443412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2143445321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2143445327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 506906 + ... + 511116.

It is an arithmetic number, because the mean of its divisors is an integer number (268843536).

Almost surely, 2^2143445321 is an apocalyptic number.

It is an amenable number.

2143445321 is a deficient number, since it is larger than the sum of its proper divisors (7302967).

2143445321 is a wasteful number, since it uses less digits than its factorization.

2143445321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5823.

The product of its digits is 11520, while the sum is 29.

The square root of 2143445321 is about 46297.3576027833. The cubic root of 2143445321 is about 1289.3499360772.

Adding to 2143445321 its reverse (1235443412), we get a palindrome (3378888733).

The spelling of 2143445321 in words is "two billion, one hundred forty-three million, four hundred forty-five thousand, three hundred twenty-one".