505933217 has 4 divisors (see below), whose sum is σ = 523379220. Its totient is φ = 488487216.

The previous prime is 505933199. The next prime is 505933271. The reversal of 505933217 is 712339505.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 203034001 + 302899216 = 14249^2 + 17404^2 .

It is a cyclic number.

It is not a de Polignac number, because 505933217 - 2¹⁴ = 505916833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505933117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8722958 + ... + 8723015.

It is an arithmetic number, because the mean of its divisors is an integer number (130844805).

Almost surely, 2^505933217 is an apocalyptic number.

It is an amenable number.

505933217 is a deficient number, since it is larger than the sum of its proper divisors (17446003).

505933217 is a wasteful number, since it uses less digits than its factorization.

505933217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17446002.

The product of its (nonzero) digits is 28350, while the sum is 35.

The square root of 505933217 is about 22492.9592761824. The cubic root of 505933217 is about 796.8276540923.

The spelling of 505933217 in words is "five hundred five million, nine hundred thirty-three thousand, two hundred seventeen".