550331 has 4 divisors (see below), whose sum is σ = 554664. Its totient is φ = 546000.

The previous prime is 550309. The next prime is 550337. The reversal of 550331 is 133055.

550331 = T₁₈ + T₁₉ + ... + T₁₄₈.

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

It is a cyclic number.

It is not a de Polignac number, because 550331 - 2⁶ = 550267 is a prime.

It is a super-2 number, since 2×550331² = 605728419122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (550337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1970 + ... + 2231.

It is an arithmetic number, because the mean of its divisors is an integer number (138666).

2⁵⁵⁰³³¹ is an apocalyptic number.

550331 is a deficient number, since it is larger than the sum of its proper divisors (4333).

550331 is a wasteful number, since it uses less digits than its factorization.

550331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4332.

The product of its (nonzero) digits is 225, while the sum is 17.

The square root of 550331 is about 741.8429752987. The cubic root of 550331 is about 81.9485598452.

Adding to 550331 its reverse (133055), we get a palindrome (683386).

The spelling of 550331 in words is "five hundred fifty thousand, three hundred thirty-one".