505560521 has 2 divisors, whose sum is σ = 505560522. Its totient is φ = 505560520.

The previous prime is 505560479. The next prime is 505560577. The reversal of 505560521 is 125065505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 452838400 + 52722121 = 21280^2 + 7261^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505560521 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (505560581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252780260 + 252780261.

It is an arithmetic number, because the mean of its divisors is an integer number (252780261).

Almost surely, 2^505560521 is an apocalyptic number.

It is an amenable number.

505560521 is a deficient number, since it is larger than the sum of its proper divisors (1).

505560521 is an equidigital number, since it uses as much as digits as its factorization.

505560521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7500, while the sum is 29.

The square root of 505560521 is about 22484.6730240847. The cubic root of 505560521 is about 796.6319448423.

The spelling of 505560521 in words is "five hundred five million, five hundred sixty thousand, five hundred twenty-one".