551890 has 16 divisors (see below), whose sum is σ = 1001880. Its totient is φ = 218880.

The previous prime is 551861. The next prime is 551909. The reversal of 551890 is 98155.

551890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 549081 + 2809 = 741^2 + 53^2 .

It is a congruent number.

It is an unprimeable number.

551890 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2170 + ... + 2410.

2⁵⁵¹⁸⁹⁰ is an apocalyptic number.

551890 is a deficient number, since it is larger than the sum of its proper divisors (449990).

551890 is a wasteful number, since it uses less digits than its factorization.

551890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477.

The product of its (nonzero) digits is 1800, while the sum is 28.

The square root of 551890 is about 742.8929936404. The cubic root of 551890 is about 82.0258692918.

It can be divided in two parts, 551 and 890, that added together give a palindrome (1441).

The spelling of 551890 in words is "five hundred fifty-one thousand, eight hundred ninety".