551688 has 32 divisors (see below), whose sum is σ = 1397760. Its totient is φ = 181440.

The previous prime is 551671. The next prime is 551689. The reversal of 551688 is 886155.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 551688.

It is not an unprimeable number, because it can be changed into a prime (551689) by changing a digit.

551688 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2958 + ... + 3138.

It is an arithmetic number, because the mean of its divisors is an integer number (43680).

2⁵⁵¹⁶⁸⁸ is an apocalyptic number.

It is an amenable number.

551688 is an abundant number, since it is smaller than the sum of its proper divisors (846072).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

551688 is a wasteful number, since it uses less digits than its factorization.

551688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317 (or 313 counting only the distinct ones).

The product of its digits is 9600, while the sum is 33.

The square root of 551688 is about 742.7570262206. The cubic root of 551688 is about 82.0158605053.

The spelling of 551688 in words is "five hundred fifty-one thousand, six hundred eighty-eight".