5556581 has 4 divisors (see below), whose sum is σ = 5571852. Its totient is φ = 5541312.

The previous prime is 5556559. The next prime is 5556619. The reversal of 5556581 is 1856555.

5556581 is digitally balanced in base 3, 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: 1856555 = 5 ⋅371311.

It can be written as a sum of positive squares in 2 ways, for example, as 4268356 + 1288225 = 2066^2 + 1135^2 .

It is a cyclic number.

It is not a de Polignac number, because 5556581 - 2⁶ = 5556517 is a prime.

It is a super-2 number, since 2×5556581² = 61751184819122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5556521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7076 + ... + 7821.

It is an arithmetic number, because the mean of its divisors is an integer number (1392963).

Almost surely, 2^5556581 is an apocalyptic number.

It is an amenable number.

5556581 is a deficient number, since it is larger than the sum of its proper divisors (15271).

5556581 is a wasteful number, since it uses less digits than its factorization.

5556581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15270.

The product of its digits is 30000, while the sum is 35.

The square root of 5556581 is about 2357.2401235343. The cubic root of 5556581 is about 177.1206578333.

The spelling of 5556581 in words is "five million, five hundred fifty-six thousand, five hundred eighty-one".