550021543 has 2 divisors, whose sum is σ = 550021544. Its totient is φ = 550021542.

The previous prime is 550021531. The next prime is 550021573. The reversal of 550021543 is 345120055.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 550021543 - 2²⁵ = 516467111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (550021573) 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, 275010771 + 275010772.

It is an arithmetic number, because the mean of its divisors is an integer number (275010772).

Almost surely, 2^550021543 is an apocalyptic number.

550021543 is a deficient number, since it is larger than the sum of its proper divisors (1).

550021543 is an equidigital number, since it uses as much as digits as its factorization.

550021543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 550021543 is about 23452.5380929229. The cubic root of 550021543 is about 819.3319678174.

Adding to 550021543 its reverse (345120055), we get a palindrome (895141598).

It can be divided in two parts, 550021 and 543, that added together give a square (550564 = 742²).

The spelling of 550021543 in words is "five hundred fifty million, twenty-one thousand, five hundred forty-three".