551343 has 16 divisors (see below), whose sum is σ = 807296. Its totient is φ = 332640.

The previous prime is 551339. The next prime is 551347. The reversal of 551343 is 343155.

It is an interprime number because it is at equal distance from previous prime (551339) and next prime (551347).

It is not a de Polignac number, because 551343 - 2² = 551339 is a prime.

It is a Duffinian number.

551343 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 551343.

It is not an unprimeable number, because it can be changed into a prime (551347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2508 + ... + 2718.

It is an arithmetic number, because the mean of its divisors is an integer number (50456).

551343 is a Friedman number, since it can be written as (3^4+1)^3-5*5, using all its digits and the basic arithmetic operations.

2⁵⁵¹³⁴³ is an apocalyptic number.

551343 is a deficient number, since it is larger than the sum of its proper divisors (255953).

551343 is a wasteful number, since it uses less digits than its factorization.

551343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294.

The product of its digits is 900, while the sum is 21.

The square root of 551343 is about 742.5247470623. The cubic root of 551343 is about 81.9987606396.

Adding to 551343 its reverse (343155), we get a palindrome (894498).

The spelling of 551343 in words is "five hundred fifty-one thousand, three hundred forty-three".