505555541 has 2 divisors, whose sum is σ = 505555542. Its totient is φ = 505555540.

The previous prime is 505555529. The next prime is 505555577. The reversal of 505555541 is 145555505.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 429691441 + 75864100 = 20729^2 + 8710^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505555541 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505558541) 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, 252777770 + 252777771.

It is an arithmetic number, because the mean of its divisors is an integer number (252777771).

Almost surely, 2^505555541 is an apocalyptic number.

It is an amenable number.

505555541 is a deficient number, since it is larger than the sum of its proper divisors (1).

505555541 is an equidigital number, since it uses as much as digits as its factorization.

505555541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62500, while the sum is 35.

The square root of 505555541 is about 22484.5622817079. The cubic root of 505555541 is about 796.6293291053.

The spelling of 505555541 in words is "five hundred five million, five hundred fifty-five thousand, five hundred forty-one".