551047 has 4 divisors (see below), whose sum is σ = 629776. Its totient is φ = 472320.

The previous prime is 551039. The next prime is 551059. The reversal of 551047 is 740155.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 551047 - 2³ = 551039 is a prime.

551047 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551017) 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, 39354 + ... + 39367.

It is an arithmetic number, because the mean of its divisors is an integer number (157444).

2⁵⁵¹⁰⁴⁷ is an apocalyptic number.

551047 is a deficient number, since it is larger than the sum of its proper divisors (78729).

551047 is an equidigital number, since it uses as much as digits as its factorization.

551047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78728.

The product of its (nonzero) digits is 700, while the sum is 22.

The square root of 551047 is about 742.3254003468. The cubic root of 551047 is about 81.9840837639.

The spelling of 551047 in words is "five hundred fifty-one thousand, forty-seven".