550521 has 6 divisors (see below), whose sum is σ = 795210. Its totient is φ = 367008.

The previous prime is 550519. The next prime is 550531. The reversal of 550521 is 125055.

550521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 435600 + 114921 = 660^2 + 339^2 .

It is not a de Polignac number, because 550521 - 2¹ = 550519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 550494 and 550503.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 550521.

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 5 ways as a sum of consecutive naturals, for example, 30576 + ... + 30593.

It is an arithmetic number, because the mean of its divisors is an integer number (132535).

2⁵⁵⁰⁵²¹ is an apocalyptic number.

It is an amenable number.

550521 is a deficient number, since it is larger than the sum of its proper divisors (244689).

550521 is a wasteful number, since it uses less digits than its factorization.

550521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61175 (or 61172 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 18.

The square root of 550521 is about 741.9710236930. The cubic root of 550521 is about 81.9579895853.

Adding to 550521 its reverse (125055), we get a palindrome (675576).

The spelling of 550521 in words is "five hundred fifty thousand, five hundred twenty-one".