556558 has 4 divisors (see below), whose sum is σ = 834840. Its totient is φ = 278278.

The previous prime is 556537. The next prime is 556559. The reversal of 556558 is 855655.

556558 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 855655 = 5 ⋅171131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556559) by changing a digit.

556558 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139138 + ... + 139141.

It is an arithmetic number, because the mean of its divisors is an integer number (208710).

2⁵⁵⁶⁵⁵⁸ is an apocalyptic number.

556558 is a deficient number, since it is larger than the sum of its proper divisors (278282).

556558 is a wasteful number, since it uses less digits than its factorization.

556558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278281.

The product of its digits is 30000, while the sum is 34.

The square root of 556558 is about 746.0281496029. The cubic root of 556558 is about 82.2564842466.

The spelling of 556558 in words is "five hundred fifty-six thousand, five hundred fifty-eight".