556361 has 4 divisors (see below), whose sum is σ = 599172. Its totient is φ = 513552.

The previous prime is 556351. The next prime is 556373. The reversal of 556361 is 163655.

556361 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.

It can be written as a sum of positive squares in 2 ways, for example, as 336400 + 219961 = 580^2 + 469^2 .

It is not a de Polignac number, because 556361 - 2¹⁰ = 555337 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 556361.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556321) 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, 21386 + ... + 21411.

It is an arithmetic number, because the mean of its divisors is an integer number (149793).

2⁵⁵⁶³⁶¹ is an apocalyptic number.

It is an amenable number.

556361 is a deficient number, since it is larger than the sum of its proper divisors (42811).

556361 is a wasteful number, since it uses less digits than its factorization.

556361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42810.

The product of its digits is 2700, while the sum is 26.

The square root of 556361 is about 745.8961053659. The cubic root of 556361 is about 82.2467778969.

The spelling of 556361 in words is "five hundred fifty-six thousand, three hundred sixty-one".