505321163 has 2 divisors, whose sum is σ = 505321164. Its totient is φ = 505321162.

The previous prime is 505321151. The next prime is 505321171. The reversal of 505321163 is 361123505.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 505321163 - 2⁴ = 505321147 is a prime.

It is not a weakly prime, because it can be changed into another prime (505341163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252660581 + 252660582.

It is an arithmetic number, because the mean of its divisors is an integer number (252660582).

Almost surely, 2^505321163 is an apocalyptic number.

505321163 is a deficient number, since it is larger than the sum of its proper divisors (1).

505321163 is an equidigital number, since it uses as much as digits as its factorization.

505321163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 505321163 is about 22479.3497014482. The cubic root of 505321163 is about 796.5062030029.

Adding to 505321163 its reverse (361123505), we get a palindrome (866444668).

The spelling of 505321163 in words is "five hundred five million, three hundred twenty-one thousand, one hundred sixty-three".