505318 has 16 divisors (see below), whose sum is σ = 838656. Its totient is φ = 226440.

The previous prime is 505313. The next prime is 505319. The reversal of 505318 is 813505.

It is a super-2 number, since 2×505318² = 510692562248, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505313) 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 in 7 ways as a sum of consecutive naturals, for example, 2155 + ... + 2377.

It is an arithmetic number, because the mean of its divisors is an integer number (52416).

2⁵⁰⁵³¹⁸ is an apocalyptic number.

505318 is a deficient number, since it is larger than the sum of its proper divisors (333338).

505318 is a wasteful number, since it uses less digits than its factorization.

505318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 505318 is about 710.8572289848. The cubic root of 505318 is about 79.6504541120.

The spelling of 505318 in words is "five hundred five thousand, three hundred eighteen".