550025121 has 4 divisors (see below), whose sum is σ = 733366832. Its totient is φ = 366683412.

The previous prime is 550025117. The next prime is 550025207. The reversal of 550025121 is 121520055.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 550025121 - 2² = 550025117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (550025101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91670851 + ... + 91670856.

It is an arithmetic number, because the mean of its divisors is an integer number (183341708).

Almost surely, 2^550025121 is an apocalyptic number.

It is an amenable number.

550025121 is a deficient number, since it is larger than the sum of its proper divisors (183341711).

550025121 is a wasteful number, since it uses less digits than its factorization.

550025121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183341710.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 550025121 is about 23452.6143745212. The cubic root of 550025121 is about 819.3337444529. Note that the first 3 decimals are identical.

Adding to 550025121 its reverse (121520055), we get a palindrome (671545176).

The spelling of 550025121 in words is "five hundred fifty million, twenty-five thousand, one hundred twenty-one".