550403 has 8 divisors (see below), whose sum is σ = 639840. Its totient is φ = 463680.

The previous prime is 550379. The next prime is 550427. The reversal of 550403 is 304055.

It is an interprime number because it is at equal distance from previous prime (550379) and next prime (550427).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 550403 - 2¹⁰ = 549379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (550703) 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 7 ways as a sum of consecutive naturals, for example, 218 + ... + 1071.

It is an arithmetic number, because the mean of its divisors is an integer number (79980).

2⁵⁵⁰⁴⁰³ is an apocalyptic number.

550403 is a deficient number, since it is larger than the sum of its proper divisors (89437).

550403 is a wasteful number, since it uses less digits than its factorization.

550403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1357.

The product of its (nonzero) digits is 300, while the sum is 17.

The square root of 550403 is about 741.8915015014. The cubic root of 550403 is about 81.9521334758.

Adding to 550403 its reverse (304055), we get a palindrome (854458).

The spelling of 550403 in words is "five hundred fifty thousand, four hundred three".