556533 has 6 divisors (see below), whose sum is σ = 803894. Its totient is φ = 371016.

The previous prime is 556519. The next prime is 556537. The reversal of 556533 is 335655.

It is a happy number.

556533 is a `hidden beast` number, since 5 + 5 + 653 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 439569 + 116964 = 663^2 + 342^2 .

It is not a de Polignac number, because 556533 - 2⁹ = 556021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 556497 and 556506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30910 + ... + 30927.

2⁵⁵⁶⁵³³ is an apocalyptic number.

It is an amenable number.

556533 is a deficient number, since it is larger than the sum of its proper divisors (247361).

556533 is a wasteful number, since it uses less digits than its factorization.

556533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61843 (or 61840 counting only the distinct ones).

The product of its digits is 6750, while the sum is 27.

The square root of 556533 is about 746.0113940149. The cubic root of 556533 is about 82.2552526032.

It can be divided in two parts, 556 and 533, that added together give a square (1089 = 33²).

The spelling of 556533 in words is "five hundred fifty-six thousand, five hundred thirty-three".