550618121 has 8 divisors (see below), whose sum is σ = 556470720. Its totient is φ = 544775472.

The previous prime is 550618111. The next prime is 550618163. The reversal of 550618121 is 121816055.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-550618121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (550618111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170306 + ... + 173508.

It is an arithmetic number, because the mean of its divisors is an integer number (69558840).

Almost surely, 2^550618121 is an apocalyptic number.

It is an amenable number.

550618121 is a deficient number, since it is larger than the sum of its proper divisors (5852599).

550618121 is a wasteful number, since it uses less digits than its factorization.

550618121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4975.

The product of its (nonzero) digits is 2400, while the sum is 29.

The square root of 550618121 is about 23465.2534825431. The cubic root of 550618121 is about 819.6280888307.

The spelling of 550618121 in words is "five hundred fifty million, six hundred eighteen thousand, one hundred twenty-one".