551943 has 12 divisors (see below), whose sum is σ = 911248. Its totient is φ = 315360.

The previous prime is 551933. The next prime is 551951. The reversal of 551943 is 349155.

It is not a de Polignac number, because 551943 - 2⁴ = 551927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551933) 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, 4318 + ... + 4443.

2⁵⁵¹⁹⁴³ is an apocalyptic number.

551943 is a deficient number, since it is larger than the sum of its proper divisors (359305).

551943 is a wasteful number, since it uses less digits than its factorization.

551943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8774 (or 8771 counting only the distinct ones).

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

The square root of 551943 is about 742.9286641394. The cubic root of 551943 is about 82.0284949551.

The spelling of 551943 in words is "five hundred fifty-one thousand, nine hundred forty-three".