551289 has 4 divisors (see below), whose sum is σ = 735056. Its totient is φ = 367524.

The previous prime is 551281. The next prime is 551297. The reversal of 551289 is 982155.

551289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (551281) and next prime (551297).

It is not a de Polignac number, because 551289 - 2³ = 551281 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551281) 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, 91879 + ... + 91884.

It is an arithmetic number, because the mean of its divisors is an integer number (183764).

2⁵⁵¹²⁸⁹ is an apocalyptic number.

It is an amenable number.

551289 is a deficient number, since it is larger than the sum of its proper divisors (183767).

551289 is a wasteful number, since it uses less digits than its factorization.

551289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183766.

The product of its digits is 3600, while the sum is 30.

The square root of 551289 is about 742.4883837475. The cubic root of 551289 is about 81.9960834933.

The spelling of 551289 in words is "five hundred fifty-one thousand, two hundred eighty-nine".