505111 has 2 divisors, whose sum is σ = 505112. Its totient is φ = 505110.

The previous prime is 505097. The next prime is 505117. The reversal of 505111 is 111505.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 505111 - 2⁷ = 504983 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 505091 and 505100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252555 + 252556.

It is an arithmetic number, because the mean of its divisors is an integer number (252556).

2⁵⁰⁵¹¹¹ is an apocalyptic number.

505111 is a deficient number, since it is larger than the sum of its proper divisors (1).

505111 is an equidigital number, since it uses as much as digits as its factorization.

505111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25, while the sum is 13.

The square root of 505111 is about 710.7116152139. The cubic root of 505111 is about 79.6395765419.

Adding to 505111 its reverse (111505), we get a palindrome (616616).

It can be divided in two parts, 505 and 111, that added together give a palindrome (616).

The spelling of 505111 in words is "five hundred five thousand, one hundred eleven".