550731 has 4 divisors (see below), whose sum is σ = 734312. Its totient is φ = 367152.

The previous prime is 550721. The next prime is 550733. The reversal of 550731 is 137055.

It is a happy number.

550731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 550731 - 2¹⁰ = 549707 is a prime.

It is a super-2 number, since 2×550731² = 606609268722, which contains 22 as substring.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 550698 and 550707.

It is not an unprimeable number, because it can be changed into a prime (550733) 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, 91786 + ... + 91791.

It is an arithmetic number, because the mean of its divisors is an integer number (183578).

2⁵⁵⁰⁷³¹ is an apocalyptic number.

550731 is a deficient number, since it is larger than the sum of its proper divisors (183581).

550731 is a wasteful number, since it uses less digits than its factorization.

550731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183580.

The product of its (nonzero) digits is 525, while the sum is 21.

The square root of 550731 is about 742.1125251604. The cubic root of 550731 is about 81.9684094057.

Adding to 550731 its reverse (137055), we get a palindrome (687786).

The spelling of 550731 in words is "five hundred fifty thousand, seven hundred thirty-one".