556281 has 16 divisors (see below), whose sum is σ = 899520. Its totient is φ = 336960.

The previous prime is 556279. The next prime is 556289. The reversal of 556281 is 182655.

It is not a de Polignac number, because 556281 - 2¹ = 556279 is a prime.

It is a super-2 number, since 2×556281² = 618897101922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (556289) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 640 + ... + 1233.

It is an arithmetic number, because the mean of its divisors is an integer number (56220).

2⁵⁵⁶²⁸¹ is an apocalyptic number.

It is an amenable number.

556281 is a deficient number, since it is larger than the sum of its proper divisors (343239).

556281 is a wasteful number, since it uses less digits than its factorization.

556281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1893 (or 1887 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 556281 is about 745.8424766665. The cubic root of 556281 is about 82.2428355779.

It can be divided in two parts, 55 and 6281, that added together give a palindrome (6336).

The spelling of 556281 in words is "five hundred fifty-six thousand, two hundred eighty-one".