550501 has 4 divisors (see below), whose sum is σ = 629152. Its totient is φ = 471852.

The previous prime is 550489. The next prime is 550513. The reversal of 550501 is 105055.

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: 105055 = 5 ⋅21011.

It is an interprime number because it is at equal distance from previous prime (550489) and next prime (550513).

It is a cyclic number.

It is not a de Polignac number, because 550501 - 2⁵ = 550469 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550531) 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, 39315 + ... + 39328.

It is an arithmetic number, because the mean of its divisors is an integer number (157288).

2⁵⁵⁰⁵⁰¹ is an apocalyptic number.

It is an amenable number.

550501 is a deficient number, since it is larger than the sum of its proper divisors (78651).

550501 is an equidigital number, since it uses as much as digits as its factorization.

550501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78650.

The product of its (nonzero) digits is 125, while the sum is 16.

The square root of 550501 is about 741.9575459553. The cubic root of 550501 is about 81.9569970833.

Adding to 550501 its reverse (105055), we get a palindrome (655556).

The spelling of 550501 in words is "five hundred fifty thousand, five hundred one".