321440543 has 2 divisors, whose sum is σ = 321440544. Its totient is φ = 321440542.

The previous prime is 321440513. The next prime is 321440551. The reversal of 321440543 is 345044123.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 321440543 - 2²⁴ = 304663327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321440513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160720271 + 160720272.

It is an arithmetic number, because the mean of its divisors is an integer number (160720272).

Almost surely, 2^321440543 is an apocalyptic number.

321440543 is a deficient number, since it is larger than the sum of its proper divisors (1).

321440543 is an equidigital number, since it uses as much as digits as its factorization.

321440543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 321440543 is about 17928.7630080828. The cubic root of 321440543 is about 685.0152148218.

Adding to 321440543 its reverse (345044123), we get a palindrome (666484666).

The spelling of 321440543 in words is "three hundred twenty-one million, four hundred forty thousand, five hundred forty-three".