5518161 has 24 divisors (see below), whose sum is σ = 8779680. Its totient is φ = 3312000.

The previous prime is 5518159. The next prime is 5518171. The reversal of 5518161 is 1618155.

It is not a de Polignac number, because 5518161 - 2¹ = 5518159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5518111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13561 + ... + 13961.

It is an arithmetic number, because the mean of its divisors is an integer number (365820).

Almost surely, 2^5518161 is an apocalyptic number.

It is an amenable number.

5518161 is a deficient number, since it is larger than the sum of its proper divisors (3261519).

5518161 is a wasteful number, since it uses less digits than its factorization.

5518161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557 (or 554 counting only the distinct ones).

The product of its digits is 1200, while the sum is 27.

The square root of 5518161 is about 2349.0766271027. The cubic root of 5518161 is about 176.7114901494.

The spelling of 5518161 in words is "five million, five hundred eighteen thousand, one hundred sixty-one".