556813 has 8 divisors (see below), whose sum is σ = 581400. Its totient is φ = 532800.

The previous prime is 556811. The next prime is 556817. The reversal of 556813 is 318655.

It can be written as a sum of positive squares in 4 ways, for example, as 228484 + 328329 = 478^2 + 573^2 .

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

It is not a de Polignac number, because 556813 - 2¹ = 556811 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 (556811) 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 7 ways as a sum of consecutive naturals, for example, 3663 + ... + 3811.

It is an arithmetic number, because the mean of its divisors is an integer number (72675).

2⁵⁵⁶⁸¹³ is an apocalyptic number.

It is an amenable number.

556813 is a deficient number, since it is larger than the sum of its proper divisors (24587).

556813 is a wasteful number, since it uses less digits than its factorization.

556813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287.

The product of its digits is 3600, while the sum is 28.

The square root of 556813 is about 746.1990351106. The cubic root of 556813 is about 82.2690449026.

It can be divided in two parts, 556 and 813, that added together give a square (1369 = 37²).

The spelling of 556813 in words is "five hundred fifty-six thousand, eight hundred thirteen".