5551559 has 4 divisors (see below), whose sum is σ = 5978616. Its totient is φ = 5124504.

The previous prime is 5551531. The next prime is 5551583. The reversal of 5551559 is 9551555.

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 5551559 - 2²⁰ = 4502983 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 (5551529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213509 + ... + 213534.

It is an arithmetic number, because the mean of its divisors is an integer number (1494654).

Almost surely, 2^5551559 is an apocalyptic number.

5551559 is a deficient number, since it is larger than the sum of its proper divisors (427057).

5551559 is a wasteful number, since it uses less digits than its factorization.

5551559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427056.

The product of its digits is 28125, while the sum is 35.

The square root of 5551559 is about 2356.1746539677. The cubic root of 5551559 is about 177.0672816023.

The spelling of 5551559 in words is "five million, five hundred fifty-one thousand, five hundred fifty-nine".