5581812 has 12 divisors (see below), whose sum is σ = 13024256. Its totient is φ = 1860600.

The previous prime is 5581769. The next prime is 5581817. The reversal of 5581812 is 2181855.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 5581812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5581817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 232564 + ... + 232587.

Almost surely, 2^5581812 is an apocalyptic number.

It is an amenable number.

5581812 is an abundant number, since it is smaller than the sum of its proper divisors (7442444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5581812 is a wasteful number, since it uses less digits than its factorization.

5581812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465158 (or 465156 counting only the distinct ones).

The product of its digits is 3200, while the sum is 30.

The square root of 5581812 is about 2362.5858714553. The cubic root of 5581812 is about 177.3883394791.

The spelling of 5581812 in words is "five million, five hundred eighty-one thousand, eight hundred twelve".