556222 has 4 divisors (see below), whose sum is σ = 834336. Its totient is φ = 278110.

The previous prime is 556219. The next prime is 556229. The reversal of 556222 is 222655.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 222655 = 5 ⋅44531.

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 an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 556193 and 556202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139054 + ... + 139057.

It is an arithmetic number, because the mean of its divisors is an integer number (208584).

2⁵⁵⁶²²² is an apocalyptic number.

556222 is a deficient number, since it is larger than the sum of its proper divisors (278114).

556222 is a wasteful number, since it uses less digits than its factorization.

556222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278113.

The product of its digits is 1200, while the sum is 22.

The square root of 556222 is about 745.8029230299. The cubic root of 556222 is about 82.2399278755.

Adding to 556222 its reverse (222655), we get a palindrome (778877).

The spelling of 556222 in words is "five hundred fifty-six thousand, two hundred twenty-two".