505400211 has 12 divisors (see below), whose sum is σ = 730922400. Its totient is φ = 336518160.

The previous prime is 505400179. The next prime is 505400213. The reversal of 505400211 is 112004505.

505400211 is a `hidden beast` number, since 50 + 5 + 400 + 211 = 666.

It is not a de Polignac number, because 505400211 - 2⁵ = 505400179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (505400213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26811 + ... + 41588.

It is an arithmetic number, because the mean of its divisors is an integer number (60910200).

Almost surely, 2^505400211 is an apocalyptic number.

505400211 is a deficient number, since it is larger than the sum of its proper divisors (225522189).

505400211 is a wasteful number, since it uses less digits than its factorization.

505400211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69226 (or 69223 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 505400211 is about 22481.1078686083. The cubic root of 505400211 is about 796.5477336466.

Adding to 505400211 its reverse (112004505), we get a palindrome (617404716).

The spelling of 505400211 in words is "five hundred five million, four hundred thousand, two hundred eleven".