543330500021 has 2 divisors, whose sum is σ = 543330500022. Its totient is φ = 543330500020.

The previous prime is 543330499993. The next prime is 543330500029. The reversal of 543330500021 is 120005033345.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 531206287921 + 12124212100 = 728839^2 + 110110^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-543330500021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (543330500029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271665250010 + 271665250011.

It is an arithmetic number, because the mean of its divisors is an integer number (271665250011).

Almost surely, 2^543330500021 is an apocalyptic number.

It is an amenable number.

543330500021 is a deficient number, since it is larger than the sum of its proper divisors (1).

543330500021 is an equidigital number, since it uses as much as digits as its factorization.

543330500021 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.

Adding to 543330500021 its reverse (120005033345), we get a palindrome (663335533366).

The spelling of 543330500021 in words is "five hundred forty-three billion, three hundred thirty million, five hundred thousand, twenty-one".