550871 has 4 divisors (see below), whose sum is σ = 557592. Its totient is φ = 544152.

The previous prime is 550861. The next prime is 550903. The reversal of 550871 is 178055.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-550871 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 550871.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 3236 + ... + 3401.

It is an arithmetic number, because the mean of its divisors is an integer number (139398).

2⁵⁵⁰⁸⁷¹ is an apocalyptic number.

550871 is a deficient number, since it is larger than the sum of its proper divisors (6721).

550871 is an equidigital number, since it uses as much as digits as its factorization.

550871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6720.

The product of its (nonzero) digits is 1400, while the sum is 26.

The square root of 550871 is about 742.2068444847. The cubic root of 550871 is about 81.9753544812.

Subtracting from 550871 its reverse (178055), we obtain a triangular number (372816 = T₈₆₃).

The spelling of 550871 in words is "five hundred fifty thousand, eight hundred seventy-one".