553403321 has 2 divisors, whose sum is σ = 553403322. Its totient is φ = 553403320.

The previous prime is 553403309. The next prime is 553403353. The reversal of 553403321 is 123304355.

553403321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 473497600 + 79905721 = 21760^2 + 8939^2 .

It is a cyclic number.

It is not a de Polignac number, because 553403321 - 2¹⁸ = 553141177 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (553403371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 276701660 + 276701661.

It is an arithmetic number, because the mean of its divisors is an integer number (276701661).

Almost surely, 2^553403321 is an apocalyptic number.

It is an amenable number.

553403321 is a deficient number, since it is larger than the sum of its proper divisors (1).

553403321 is an equidigital number, since it uses as much as digits as its factorization.

553403321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 26.

The square root of 553403321 is about 23524.5259463395. The cubic root of 553403321 is about 821.0077442630.

Adding to 553403321 its reverse (123304355), we get a palindrome (676707676).

The spelling of 553403321 in words is "five hundred fifty-three million, four hundred three thousand, three hundred twenty-one".