505055543 has 2 divisors, whose sum is σ = 505055544. Its totient is φ = 505055542.

The previous prime is 505055531. The next prime is 505055557. The reversal of 505055543 is 345550505.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 505055543 - 2⁶ = 505055479 is a prime.

It is a super-2 number, since 2×505055543² = 510162203030049698, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505055563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252527771 + 252527772.

It is an arithmetic number, because the mean of its divisors is an integer number (252527772).

Almost surely, 2^505055543 is an apocalyptic number.

505055543 is a deficient number, since it is larger than the sum of its proper divisors (1).

505055543 is an equidigital number, since it uses as much as digits as its factorization.

505055543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37500, while the sum is 32.

The square root of 505055543 is about 22473.4408357955. The cubic root of 505055543 is about 796.3666184681.

The spelling of 505055543 in words is "five hundred five million, fifty-five thousand, five hundred forty-three".