550550 has 72 divisors (see below), whose sum is σ = 1385328. Its totient is φ = 158400.

The previous prime is 550541. The next prime is 550553. The reversal of 550550 is 55055.

550550 = T₇₉ + T₈₀ + ... + T₁₅₅.

It is a happy number.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550553) by changing a digit.

550550 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 42344 + ... + 42356.

2⁵⁵⁰⁵⁵⁰ is an apocalyptic number.

550550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

550550 is an abundant number, since it is smaller than the sum of its proper divisors (834778).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

550550 is a wasteful number, since it uses less digits than its factorization.

550550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54 (or 38 counting only the distinct ones).

The product of its (nonzero) digits is 625, while the sum is 20.

The square root of 550550 is about 741.9905659778. The cubic root of 550550 is about 81.9594286706.

It can be divided in two parts, 5505 and 50, that added together give a palindrome (5555).

The spelling of 550550 in words is "five hundred fifty thousand, five hundred fifty".