543255221 has 2 divisors, whose sum is σ = 543255222. Its totient is φ = 543255220.

The previous prime is 543255161. The next prime is 543255233. The reversal of 543255221 is 122552345.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 540051121 + 3204100 = 23239^2 + 1790^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-543255221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (543255241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271627610 + 271627611.

It is an arithmetic number, because the mean of its divisors is an integer number (271627611).

Almost surely, 2^543255221 is an apocalyptic number.

It is an amenable number.

543255221 is a deficient number, since it is larger than the sum of its proper divisors (1).

543255221 is an equidigital number, since it uses as much as digits as its factorization.

543255221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12000, while the sum is 29.

The square root of 543255221 is about 23307.8360428419. The cubic root of 543255221 is about 815.9583096772.

The spelling of 543255221 in words is "five hundred forty-three million, two hundred fifty-five thousand, two hundred twenty-one".