5518643 has 8 divisors (see below), whose sum is σ = 6201888. Its totient is φ = 4872384.

The previous prime is 5518633. The next prime is 5518673. The reversal of 5518643 is 3468155.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5518643 - 2⁴ = 5518627 is a prime.

It is a super-2 number, since 2×5518643² = 60910841122898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5518633) 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 7 ways as a sum of consecutive naturals, for example, 8930 + ... + 9527.

It is an arithmetic number, because the mean of its divisors is an integer number (775236).

Almost surely, 2^5518643 is an apocalyptic number.

5518643 is a deficient number, since it is larger than the sum of its proper divisors (683245).

5518643 is a wasteful number, since it uses less digits than its factorization.

5518643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18493.

The product of its digits is 14400, while the sum is 32.

The square root of 5518643 is about 2349.1792183654. The cubic root of 5518643 is about 176.7166351279.

The spelling of 5518643 in words is "five million, five hundred eighteen thousand, six hundred forty-three".