516217 has 4 divisors (see below), whose sum is σ = 555940. Its totient is φ = 476496.

The previous prime is 516209. The next prime is 516223. The reversal of 516217 is 712615.

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 281961 + 234256 = 531^2 + 484^2 .

It is a cyclic number.

It is not a de Polignac number, because 516217 - 2³ = 516209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (516227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19842 + ... + 19867.

It is an arithmetic number, because the mean of its divisors is an integer number (138985).

2⁵¹⁶²¹⁷ is an apocalyptic number.

It is an amenable number.

516217 is a deficient number, since it is larger than the sum of its proper divisors (39723).

516217 is a wasteful number, since it uses less digits than its factorization.

516217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39722.

The product of its digits is 420, while the sum is 22.

The square root of 516217 is about 718.4824284560. The cubic root of 516217 is about 80.2190351643.

The spelling of 516217 in words is "five hundred sixteen thousand, two hundred seventeen".