2043403321 has 2 divisors, whose sum is σ = 2043403322. Its totient is φ = 2043403320.

The previous prime is 2043403291. The next prime is 2043403331. The reversal of 2043403321 is 1233043402.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1516012096 + 527391225 = 38936^2 + 22965^2 .

It is a cyclic number.

It is not a de Polignac number, because 2043403321 - 2¹⁷ = 2043272249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2043403292 and 2043403301.

It is not a weakly prime, because it can be changed into another prime (2043403331) 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 as a sum of consecutive naturals, namely, 1021701660 + 1021701661.

It is an arithmetic number, because the mean of its divisors is an integer number (1021701661).

Almost surely, 2^2043403321 is an apocalyptic number.

It is an amenable number.

2043403321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2043403321 is an equidigital number, since it uses as much as digits as its factorization.

2043403321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 2043403321 is about 45204.0188589466. The cubic root of 2043403321 is about 1268.9700292006.

Adding to 2043403321 its reverse (1233043402), we get a palindrome (3276446723).

The spelling of 2043403321 in words is "two billion, forty-three million, four hundred three thousand, three hundred twenty-one".