2143214321 has 8 divisors (see below), whose sum is σ = 2200812264. Its totient is φ = 2086341120.

The previous prime is 2143214317. The next prime is 2143214323. The reversal of 2143214321 is 1234123412.

It can be written as a sum of positive squares in 4 ways, for example, as 199374400 + 1943839921 = 14120^2 + 44089^2 .

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 2143214321 - 2² = 2143214317 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2143214323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175190 + ... + 187023.

It is an arithmetic number, because the mean of its divisors is an integer number (275101533).

Almost surely, 2^2143214321 is an apocalyptic number.

It is an amenable number.

2143214321 is a deficient number, since it is larger than the sum of its proper divisors (57597943).

2143214321 is an equidigital number, since it uses as much as digits as its factorization.

2143214321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362371.

The product of its digits is 1152, while the sum is 23.

The square root of 2143214321 is about 46294.8627927549. The cubic root of 2143214321 is about 1289.3036164856.

Adding to 2143214321 its reverse (1234123412), we get a palindrome (3377337733).

Subtracting from 2143214321 its reverse (1234123412), we obtain a palindrome (909090909).

It can be divided in two parts, 21432143 and 21, that multiplied together give a triangular number (450075003 = T₃₀₀₀₂).

The spelling of 2143214321 in words is "two billion, one hundred forty-three million, two hundred fourteen thousand, three hundred twenty-one".