556217 has 4 divisors (see below), whose sum is σ = 560100. Its totient is φ = 552336.

The previous prime is 556211. The next prime is 556219. The reversal of 556217 is 712655.

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 173056 + 383161 = 416^2 + 619^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-556217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (556211) 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, 1718 + ... + 2015.

It is an arithmetic number, because the mean of its divisors is an integer number (140025).

2⁵⁵⁶²¹⁷ is an apocalyptic number.

It is an amenable number.

556217 is a deficient number, since it is larger than the sum of its proper divisors (3883).

556217 is a wasteful number, since it uses less digits than its factorization.

556217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3882.

The product of its digits is 2100, while the sum is 26.

The square root of 556217 is about 745.7995709304. The cubic root of 556217 is about 82.2396814505.

The spelling of 556217 in words is "five hundred fifty-six thousand, two hundred seventeen".