551439 has 12 divisors (see below), whose sum is σ = 910416. Its totient is φ = 315072.

The previous prime is 551423. The next prime is 551443. The reversal of 551439 is 934155.

It is not a de Polignac number, because 551439 - 2⁴ = 551423 is a prime.

It is a d-powerful number, because it can be written as 5³ + 5³ + 4³ + 1 + 3⁹ + 9⁶ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551489) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4314 + ... + 4439.

It is an arithmetic number, because the mean of its divisors is an integer number (75868).

2⁵⁵¹⁴³⁹ is an apocalyptic number.

551439 is a deficient number, since it is larger than the sum of its proper divisors (358977).

551439 is a wasteful number, since it uses less digits than its factorization.

551439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8766 (or 8763 counting only the distinct ones).

The product of its digits is 2700, while the sum is 27.

The square root of 551439 is about 742.5893885587. The cubic root of 551439 is about 82.0035195793.

It can be divided in two parts, 551 and 439, that added together give a triangular number (990 = T₄₄).

The spelling of 551439 in words is "five hundred fifty-one thousand, four hundred thirty-nine".