543313321 has 2 divisors, whose sum is σ = 543313322. Its totient is φ = 543313320.

The previous prime is 543313313. The next prime is 543313327. The reversal of 543313321 is 123313345.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 530611225 + 12702096 = 23035^2 + 3564^2 .

It is a cyclic number.

It is not a de Polignac number, because 543313321 - 2³ = 543313313 is a prime.

It is not a weakly prime, because it can be changed into another prime (543313327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271656660 + 271656661.

It is an arithmetic number, because the mean of its divisors is an integer number (271656661).

Almost surely, 2^543313321 is an apocalyptic number.

It is an amenable number.

543313321 is a deficient number, since it is larger than the sum of its proper divisors (1).

543313321 is an equidigital number, since it uses as much as digits as its factorization.

543313321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 25.

The square root of 543313321 is about 23309.0823714706. The cubic root of 543313321 is about 815.9873969803.

Adding to 543313321 its reverse (123313345), we get a palindrome (666626666).

The spelling of 543313321 in words is "five hundred forty-three million, three hundred thirteen thousand, three hundred twenty-one".