505811323 has 2 divisors, whose sum is σ = 505811324. Its totient is φ = 505811322.

The previous prime is 505811311. The next prime is 505811351. The reversal of 505811323 is 323118505.

It is an a-pointer prime, because the next prime (505811351) can be obtained adding 505811323 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 505811323 - 2⁵ = 505811291 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 505811291 and 505811300.

It is not a weakly prime, because it can be changed into another prime (505811303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252905661 + 252905662.

It is an arithmetic number, because the mean of its divisors is an integer number (252905662).

Almost surely, 2^505811323 is an apocalyptic number.

505811323 is a deficient number, since it is larger than the sum of its proper divisors (1).

505811323 is an equidigital number, since it uses as much as digits as its factorization.

505811323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 505811323 is about 22490.2495095097. The cubic root of 505811323 is about 796.7636559807.

Adding to 505811323 its reverse (323118505), we get a palindrome (828929828).

The spelling of 505811323 in words is "five hundred five million, eight hundred eleven thousand, three hundred twenty-three".