550881 has 12 divisors (see below), whose sum is σ = 825552. Its totient is φ = 367092.

The previous prime is 550861. The next prime is 550903. The reversal of 550881 is 188055.

550881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 550881 - 2⁹ = 550369 is a prime.

It is a super-2 number, since 2×550881² = 606939752322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (550801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 891 + ... + 1376.

It is an arithmetic number, because the mean of its divisors is an integer number (68796).

2⁵⁵⁰⁸⁸¹ is an apocalyptic number.

It is an amenable number.

550881 is a deficient number, since it is larger than the sum of its proper divisors (274671).

550881 is an equidigital number, since it uses as much as digits as its factorization.

550881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2282 (or 2270 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 27.

The square root of 550881 is about 742.2135811207. The cubic root of 550881 is about 81.9758505130.

It can be divided in two parts, 550 and 881, that added together give a triangular number (1431 = T₅₃).

The spelling of 550881 in words is "five hundred fifty thousand, eight hundred eighty-one".