5518447 has 12 divisors (see below), whose sum is σ = 6176520. Its totient is φ = 4925360.

The previous prime is 5518433. The next prime is 5518453. The reversal of 5518447 is 7448155.

It is a de Polignac number, because none of the positive numbers 2^k-5518447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5518547) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6753 + ... + 7525.

It is an arithmetic number, because the mean of its divisors is an integer number (514710).

Almost surely, 2^5518447 is an apocalyptic number.

5518447 is a deficient number, since it is larger than the sum of its proper divisors (658073).

5518447 is a wasteful number, since it uses less digits than its factorization.

5518447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854 (or 843 counting only the distinct ones).

The product of its digits is 22400, while the sum is 34.

The square root of 5518447 is about 2349.1375012970. The cubic root of 5518447 is about 176.7145430151.

It can be divided in two parts, 551 and 8447, that added together give a palindrome (8998).

The spelling of 5518447 in words is "five million, five hundred eighteen thousand, four hundred forty-seven".