5515663 has 4 divisors (see below), whose sum is σ = 5536288. Its totient is φ = 5495040.

The previous prime is 5515651. The next prime is 5515669. The reversal of 5515663 is 3665155.

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 5515663 - 2⁹ = 5515151 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5515669) 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, 9906 + ... + 10447.

It is an arithmetic number, because the mean of its divisors is an integer number (1384072).

Almost surely, 2^5515663 is an apocalyptic number.

5515663 is a deficient number, since it is larger than the sum of its proper divisors (20625).

5515663 is a wasteful number, since it uses less digits than its factorization.

5515663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20624.

The product of its digits is 13500, while the sum is 31.

The square root of 5515663 is about 2348.5448686367. The cubic root of 5515663 is about 176.6848211240.

The spelling of 5515663 in words is "five million, five hundred fifteen thousand, six hundred sixty-three".