5551909 has 16 divisors (see below), whose sum is σ = 6298560. Its totient is φ = 4850560.

The previous prime is 5551879. The next prime is 5551919. The reversal of 5551909 is 9091555.

It is not a de Polignac number, because 5551909 - 2¹⁹ = 5027621 is a prime.

It is a Duffinian number.

5551909 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5551919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51834 + ... + 51940.

It is an arithmetic number, because the mean of its divisors is an integer number (393660).

Almost surely, 2^5551909 is an apocalyptic number.

It is an amenable number.

5551909 is a deficient number, since it is larger than the sum of its proper divisors (746651).

5551909 is a wasteful number, since it uses less digits than its factorization.

5551909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260.

The product of its (nonzero) digits is 10125, while the sum is 34.

The square root of 5551909 is about 2356.2489257292. The cubic root of 5551909 is about 177.0710026139.

The spelling of 5551909 in words is "five million, five hundred fifty-one thousand, nine hundred nine".