551609 has 8 divisors (see below), whose sum is σ = 596160. Its totient is φ = 508816.

The previous prime is 551597. The next prime is 551651. The reversal of 551609 is 906155.

551609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 551609 - 2¹² = 547513 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254 + ... + 1080.

It is an arithmetic number, because the mean of its divisors is an integer number (74520).

2⁵⁵¹⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

551609 is a deficient number, since it is larger than the sum of its proper divisors (44551).

551609 is a wasteful number, since it uses less digits than its factorization.

551609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879.

The product of its (nonzero) digits is 1350, while the sum is 26.

The square root of 551609 is about 742.7038440725. The cubic root of 551609 is about 82.0119455133.

The spelling of 551609 in words is "five hundred fifty-one thousand, six hundred nine".