505531323 has 24 divisors (see below), whose sum is σ = 797322240. Its totient is φ = 306102960.

The previous prime is 505531307. The next prime is 505531357. The reversal of 505531323 is 323135505.

It is not a de Polignac number, because 505531323 - 2⁴ = 505531307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (505531373) 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 in 23 ways as a sum of consecutive naturals, for example, 172690 + ... + 175592.

It is an arithmetic number, because the mean of its divisors is an integer number (33221760).

Almost surely, 2^505531323 is an apocalyptic number.

505531323 is a deficient number, since it is larger than the sum of its proper divisors (291790917).

505531323 is a wasteful number, since it uses less digits than its factorization.

505531323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4679 (or 4676 counting only the distinct ones).

The product of its (nonzero) digits is 6750, while the sum is 27.

The square root of 505531323 is about 22484.0237279718. The cubic root of 505531323 is about 796.6166083947.

Adding to 505531323 its reverse (323135505), we get a palindrome (828666828).

The spelling of 505531323 in words is "five hundred five million, five hundred thirty-one thousand, three hundred twenty-three".