506553 has 4 divisors (see below), whose sum is σ = 675408. Its totient is φ = 337700.

The previous prime is 506551. The next prime is 506563. The reversal of 506553 is 355605.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 506553 - 2¹ = 506551 is a prime.

It is a super-3 number, since 3×506553³ = 389938332333523131, which contains 333 as substring.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (506551) 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, 84423 + ... + 84428.

It is an arithmetic number, because the mean of its divisors is an integer number (168852).

2⁵⁰⁶⁵⁵³ is an apocalyptic number.

It is an amenable number.

506553 is a deficient number, since it is larger than the sum of its proper divisors (168855).

506553 is a wasteful number, since it uses less digits than its factorization.

506553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168854.

The product of its (nonzero) digits is 2250, while the sum is 24.

The square root of 506553 is about 711.7253683831. The cubic root of 506553 is about 79.7152900383.

The spelling of 506553 in words is "five hundred six thousand, five hundred fifty-three".