505560101 has 2 divisors, whose sum is σ = 505560102. Its totient is φ = 505560100.

The previous prime is 505560089. The next prime is 505560109. The reversal of 505560101 is 101065505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 326669476 + 178890625 = 18074^2 + 13375^2 .

It is a cyclic number.

It is not a de Polignac number, because 505560101 - 2¹⁰ = 505559077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505560109) 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, 252780050 + 252780051.

It is an arithmetic number, because the mean of its divisors is an integer number (252780051).

Almost surely, 2^505560101 is an apocalyptic number.

It is an amenable number.

505560101 is a deficient number, since it is larger than the sum of its proper divisors (1).

505560101 is an equidigital number, since it uses as much as digits as its factorization.

505560101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 505560101 is about 22484.6636843872. The cubic root of 505560101 is about 796.6317242386.

It can be divided in two parts, 5055 and 60101, that added together give a palindrome (65156).

The spelling of 505560101 in words is "five hundred five million, five hundred sixty thousand, one hundred one".