551864 has 16 divisors (see below), whose sum is σ = 1046520. Its totient is φ = 272800.

The previous prime is 551861. The next prime is 551909. The reversal of 551864 is 468155.

It is a happy number.

551864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551861) 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, 467 + ... + 1149.

2⁵⁵¹⁸⁶⁴ is an apocalyptic number.

It is an amenable number.

551864 is a deficient number, since it is larger than the sum of its proper divisors (494656).

551864 is a wasteful number, since it uses less digits than its factorization.

551864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790 (or 786 counting only the distinct ones).

The product of its digits is 4800, while the sum is 29.

The square root of 551864 is about 742.8754942788. The cubic root of 551864 is about 82.0245811691.

The spelling of 551864 in words is "five hundred fifty-one thousand, eight hundred sixty-four".