5518631 has 4 divisors (see below), whose sum is σ = 5531064. Its totient is φ = 5506200.

The previous prime is 5518627. The next prime is 5518633. The reversal of 5518631 is 1368155.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 5518631 - 2² = 5518627 is a prime.

It is a super-2 number, since 2×5518631² = 60910576228322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5518594 and 5518603.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 5525 + ... + 6446.

It is an arithmetic number, because the mean of its divisors is an integer number (1382766).

Almost surely, 2^5518631 is an apocalyptic number.

5518631 is a deficient number, since it is larger than the sum of its proper divisors (12433).

5518631 is a wasteful number, since it uses less digits than its factorization.

5518631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12432.

The product of its digits is 3600, while the sum is 29.

The square root of 5518631 is about 2349.1766642805. The cubic root of 5518631 is about 176.7165070407.

The spelling of 5518631 in words is "five million, five hundred eighteen thousand, six hundred thirty-one".