550115 has 4 divisors (see below), whose sum is σ = 660144. Its totient is φ = 440088.

The previous prime is 550111. The next prime is 550117. The reversal of 550115 is 511055.

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 550115 - 2² = 550111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 550093 and 550102.

It is not an unprimeable number, because it can be changed into a prime (550111) 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, 55007 + ... + 55016.

It is an arithmetic number, because the mean of its divisors is an integer number (165036).

2⁵⁵⁰¹¹⁵ is an apocalyptic number.

550115 is a deficient number, since it is larger than the sum of its proper divisors (110029).

550115 is a wasteful number, since it uses less digits than its factorization.

550115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110028.

The product of its (nonzero) digits is 125, while the sum is 17.

The square root of 550115 is about 741.6973776413. The cubic root of 550115 is about 81.9378370831.

Subtracting from 550115 its reverse (511055), we obtain a triangular number (39060 = T₂₇₉).

The spelling of 550115 in words is "five hundred fifty thousand, one hundred fifteen".