551887 has 8 divisors (see below), whose sum is σ = 644000. Its totient is φ = 472752.

The previous prime is 551861. The next prime is 551909. The reversal of 551887 is 788155.

It is not a de Polignac number, because 551887 - 2¹¹ = 549839 is a prime.

551887 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 462 + ... + 1147.

It is an arithmetic number, because the mean of its divisors is an integer number (80500).

2⁵⁵¹⁸⁸⁷ is an apocalyptic number.

551887 is a deficient number, since it is larger than the sum of its proper divisors (92113).

551887 is an equidigital number, since it uses as much as digits as its factorization.

551887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1630 (or 1616 counting only the distinct ones).

The product of its digits is 11200, while the sum is 34.

The square root of 551887 is about 742.8909745043. The cubic root of 551887 is about 82.0257206643.

The spelling of 551887 in words is "five hundred fifty-one thousand, eight hundred eighty-seven".