556501 has 4 divisors (see below), whose sum is σ = 607104. Its totient is φ = 505900.

The previous prime is 556487. The next prime is 556513. The reversal of 556501 is 105655.

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 556501 - 2⁷ = 556373 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25285 + ... + 25306.

It is an arithmetic number, because the mean of its divisors is an integer number (151776).

2⁵⁵⁶⁵⁰¹ is an apocalyptic number.

It is an amenable number.

556501 is a deficient number, since it is larger than the sum of its proper divisors (50603).

556501 is a wasteful number, since it uses less digits than its factorization.

556501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50602.

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 556501 is about 745.9899463130. The cubic root of 556501 is about 82.2536760459.

It can be divided in two parts, 55 and 6501, that added together give a palindrome (6556).

The spelling of 556501 in words is "five hundred fifty-six thousand, five hundred one".