556523 has 4 divisors (see below), whose sum is σ = 607128. Its totient is φ = 505920.

The previous prime is 556519. The next prime is 556537. The reversal of 556523 is 325655.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 556523 - 2² = 556519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 556492 and 556501.

It is not an unprimeable number, because it can be changed into a prime (556513) 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 3 ways as a sum of consecutive naturals, for example, 25286 + ... + 25307.

It is an arithmetic number, because the mean of its divisors is an integer number (151782).

2⁵⁵⁶⁵²³ is an apocalyptic number.

556523 is a deficient number, since it is larger than the sum of its proper divisors (50605).

556523 is a wasteful number, since it uses less digits than its factorization.

556523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50604.

The product of its digits is 4500, while the sum is 26.

The square root of 556523 is about 746.0046916743. The cubic root of 556523 is about 82.2547599355.

It can be divided in two parts, 55652 and 3, that added together give a palindrome (55655).

The spelling of 556523 in words is "five hundred fifty-six thousand, five hundred twenty-three".