551409 has 8 divisors (see below), whose sum is σ = 753312. Its totient is φ = 358560.

The previous prime is 551407. The next prime is 551423. The reversal of 551409 is 904155.

551409 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 not a de Polignac number, because 551409 - 2¹ = 551407 is a prime.

It is not an unprimeable number, because it can be changed into a prime (551407) 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, 2119 + ... + 2364.

It is an arithmetic number, because the mean of its divisors is an integer number (94164).

2⁵⁵¹⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

551409 is a deficient number, since it is larger than the sum of its proper divisors (201903).

551409 is a wasteful number, since it uses less digits than its factorization.

551409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4527.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 551409 is about 742.5691886956. The cubic root of 551409 is about 82.0020324699.

The spelling of 551409 in words is "five hundred fifty-one thousand, four hundred nine".