550081 has 4 divisors (see below), whose sum is σ = 628672. Its totient is φ = 471492.

The previous prime is 550073. The next prime is 550111. The reversal of 550081 is 180055.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 180055 = 5 ⋅36011.

It is not a de Polignac number, because 550081 - 2³ = 550073 is a prime.

It is a super-2 number, since 2×550081² = 605178213122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (550061) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 39285 + ... + 39298.

It is an arithmetic number, because the mean of its divisors is an integer number (157168).

2⁵⁵⁰⁰⁸¹ is an apocalyptic number.

It is an amenable number.

550081 is a deficient number, since it is larger than the sum of its proper divisors (78591).

550081 is an equidigital number, since it uses as much as digits as its factorization.

550081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78590.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 550081 is about 741.6744568879. The cubic root of 550081 is about 81.9361489852.

It can be divided in two parts, 5 and 50081, that added together give a triangular number (50086 = T₃₁₆).

The spelling of 550081 in words is "five hundred fifty thousand, eighty-one".