506218 has 4 divisors (see below), whose sum is σ = 759330. Its totient is φ = 253108.

The previous prime is 506213. The next prime is 506251. The reversal of 506218 is 812605.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 263169 + 243049 = 513^2 + 493^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (506213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126553 + ... + 126556.

2⁵⁰⁶²¹⁸ is an apocalyptic number.

506218 is a deficient number, since it is larger than the sum of its proper divisors (253112).

506218 is a wasteful number, since it uses less digits than its factorization.

506218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253111.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 506218 is about 711.4899858747. The cubic root of 506218 is about 79.6977133904.

The spelling of 506218 in words is "five hundred six thousand, two hundred eighteen".