5549581 has 4 divisors (see below), whose sum is σ = 5555200. Its totient is φ = 5543964.

The previous prime is 5549569. The next prime is 5549587. The reversal of 5549581 is 1859455.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 5549581 - 2⁹ = 5549069 is a prime.

It is a super-2 number, since 2×5549581² = 61595698551122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5549581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5549587) 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, 891 + ... + 3448.

It is an arithmetic number, because the mean of its divisors is an integer number (1388800).

Almost surely, 2^5549581 is an apocalyptic number.

It is an amenable number.

5549581 is a deficient number, since it is larger than the sum of its proper divisors (5619).

5549581 is a wasteful number, since it uses less digits than its factorization.

5549581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5618.

The product of its digits is 36000, while the sum is 37.

The square root of 5549581 is about 2355.7548684021. The cubic root of 5549581 is about 177.0462496311.

The spelling of 5549581 in words is "five million, five hundred forty-nine thousand, five hundred eighty-one".