5550509 has 4 divisors (see below), whose sum is σ = 5557020. Its totient is φ = 5544000.

The previous prime is 5550497. The next prime is 5550529. The reversal of 5550509 is 9050555.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 3988009 + 1562500 = 1997^2 + 1250^2 .

It is a cyclic number.

It is not a de Polignac number, because 5550509 - 2²⁰ = 4501933 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 (5550529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1742 + ... + 3759.

It is an arithmetic number, because the mean of its divisors is an integer number (1389255).

Almost surely, 2^5550509 is an apocalyptic number.

It is an amenable number.

5550509 is a deficient number, since it is larger than the sum of its proper divisors (6511).

5550509 is a wasteful number, since it uses less digits than its factorization.

5550509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6510.

The product of its (nonzero) digits is 5625, while the sum is 29.

The square root of 5550509 is about 2355.9518246348. The cubic root of 5550509 is about 177.0561176291.

The spelling of 5550509 in words is "five million, five hundred fifty thousand, five hundred nine".