551898 has 12 divisors (see below), whose sum is σ = 1195818. Its totient is φ = 183960.

The previous prime is 551861. The next prime is 551909. The reversal of 551898 is 898155.

It can be written as a sum of positive squares in only one way, i.e., 294849 + 257049 = 543^2 + 507^2 .

It is a Curzon number.

It is an unprimeable number.

551898 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 (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15313 + ... + 15348.

2⁵⁵¹⁸⁹⁸ is an apocalyptic number.

551898 is an abundant number, since it is smaller than the sum of its proper divisors (643920).

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

551898 is a wasteful number, since it uses less digits than its factorization.

551898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30669 (or 30666 counting only the distinct ones).

The product of its digits is 14400, while the sum is 36.

The square root of 551898 is about 742.8983779764. The cubic root of 551898 is about 82.0262656291.

It can be divided in two parts, 55 and 1898, that added together give a triangular number (1953 = T₆₂).

The spelling of 551898 in words is "five hundred fifty-one thousand, eight hundred ninety-eight".