505211 has 4 divisors (see below), whose sum is σ = 577392. Its totient is φ = 433032.

The previous prime is 505201. The next prime is 505213. The reversal of 505211 is 112505.

Added to its reverse (112505) it gives a triangular number (617716 = T₁₁₁₁).

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 112505 = 5 ⋅22501.

It is a cyclic number.

It is not a de Polignac number, because 505211 - 2¹⁰ = 504187 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 505211.

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 in 3 ways as a sum of consecutive naturals, for example, 36080 + ... + 36093.

It is an arithmetic number, because the mean of its divisors is an integer number (144348).

2⁵⁰⁵²¹¹ is an apocalyptic number.

505211 is a deficient number, since it is larger than the sum of its proper divisors (72181).

505211 is an equidigital number, since it uses as much as digits as its factorization.

505211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72180.

The product of its (nonzero) digits is 50, while the sum is 14.

The square root of 505211 is about 710.7819637554. The cubic root of 505211 is about 79.6448317776.

Adding to 505211 its reverse (112505), we get a palindrome (617716).

The spelling of 505211 in words is "five hundred five thousand, two hundred eleven".