505217005 has 4 divisors (see below), whose sum is σ = 606260412. Its totient is φ = 404173600.

The previous prime is 505217003. The next prime is 505217029. The reversal of 505217005 is 500712505.

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 388641796 + 116575209 = 19714^2 + 10797^2 .

It is not a de Polignac number, because 505217005 - 2¹ = 505217003 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505217003) 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, 50521696 + ... + 50521705.

It is an arithmetic number, because the mean of its divisors is an integer number (151565103).

Almost surely, 2^505217005 is an apocalyptic number.

It is an amenable number.

505217005 is a deficient number, since it is larger than the sum of its proper divisors (101043407).

505217005 is a wasteful number, since it uses less digits than its factorization.

505217005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101043406.

The product of its (nonzero) digits is 1750, while the sum is 25.

The square root of 505217005 is about 22477.0328335392. The cubic root of 505217005 is about 796.4514733247.

The spelling of 505217005 in words is "five hundred five million, two hundred seventeen thousand, five".