505216 has 16 divisors (see below), whose sum is σ = 1006740. Its totient is φ = 252544.

The previous prime is 505213. The next prime is 505231. The reversal of 505216 is 612505.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (16).

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 505193 and 505202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1846 + ... + 2101.

2⁵⁰⁵²¹⁶ is an apocalyptic number.

It is an amenable number.

505216 is a deficient number, since it is larger than the sum of its proper divisors (501524).

505216 is an equidigital number, since it uses as much as digits as its factorization.

505216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3961 (or 3949 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 505216 is about 710.7854809997. The cubic root of 505216 is about 79.6450945212.

The spelling of 505216 in words is "five hundred five thousand, two hundred sixteen".