506661211 has 4 divisors (see below), whose sum is σ = 579041392. Its totient is φ = 434281032.

The previous prime is 506661203. The next prime is 506661229. The reversal of 506661211 is 112166605.

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

It is a cyclic number.

It is not a de Polignac number, because 506661211 - 2³ = 506661203 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 506661211.

It is not an unprimeable number, because it can be changed into a prime (506601211) 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, 36190080 + ... + 36190093.

It is an arithmetic number, because the mean of its divisors is an integer number (144760348).

Almost surely, 2^506661211 is an apocalyptic number.

506661211 is a deficient number, since it is larger than the sum of its proper divisors (72380181).

506661211 is an equidigital number, since it uses as much as digits as its factorization.

506661211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72380180.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 506661211 is about 22509.1361673433. The cubic root of 506661211 is about 797.2096595448.

The spelling of 506661211 in words is "five hundred six million, six hundred sixty-one thousand, two hundred eleven".