550915 has 4 divisors (see below), whose sum is σ = 661104. Its totient is φ = 440728.

The previous prime is 550909. The next prime is 550937. The reversal of 550915 is 519055.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 519055 = 5 ⋅103811.

It is a cyclic number.

It is not a de Polignac number, because 550915 - 2¹³ = 542723 is a prime.

It is a Duffinian number.

550915 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 550915.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55087 + ... + 55096.

It is an arithmetic number, because the mean of its divisors is an integer number (165276).

2⁵⁵⁰⁹¹⁵ is an apocalyptic number.

550915 is a deficient number, since it is larger than the sum of its proper divisors (110189).

550915 is a wasteful number, since it uses less digits than its factorization.

550915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110188.

The product of its (nonzero) digits is 1125, while the sum is 25.

The square root of 550915 is about 742.2364852256. The cubic root of 550915 is about 81.9775369761.

The spelling of 550915 in words is "five hundred fifty thousand, nine hundred fifteen".