551843 has 2 divisors, whose sum is σ = 551844. Its totient is φ = 551842.

The previous prime is 551813. The next prime is 551849. The reversal of 551843 is 348155.

551843 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 551843 - 2⁸ = 551587 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 551843.

It is not a weakly prime, because it can be changed into another prime (551849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275921 + 275922.

It is an arithmetic number, because the mean of its divisors is an integer number (275922).

2⁵⁵¹⁸⁴³ is an apocalyptic number.

551843 is a deficient number, since it is larger than the sum of its proper divisors (1).

551843 is an equidigital number, since it uses as much as digits as its factorization.

551843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2400, while the sum is 26.

The square root of 551843 is about 742.8613598781. The cubic root of 551843 is about 82.0235407328.

Adding to 551843 its reverse (348155), we get a palindrome (899998).

The spelling of 551843 in words is "five hundred fifty-one thousand, eight hundred forty-three".