505312211 has 8 divisors (see below), whose sum is σ = 523034400. Its totient is φ = 487609920.

The previous prime is 505312189. The next prime is 505312243. The reversal of 505312211 is 112213505.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 505312211 - 2¹⁰ = 505311187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505312261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62330 + ... + 69968.

It is an arithmetic number, because the mean of its divisors is an integer number (65379300).

Almost surely, 2^505312211 is an apocalyptic number.

505312211 is a deficient number, since it is larger than the sum of its proper divisors (17722189).

505312211 is a wasteful number, since it uses less digits than its factorization.

505312211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9949.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 505312211 is about 22479.1505844861. The cubic root of 505312211 is about 796.5014994822.

Adding to 505312211 its reverse (112213505), we get a palindrome (617525716).

The spelling of 505312211 in words is "five hundred five million, three hundred twelve thousand, two hundred eleven".