550121251 has 8 divisors (see below), whose sum is σ = 562887360. Its totient is φ = 537469992.

The previous prime is 550121233. The next prime is 550121279. The reversal of 550121251 is 152121055.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 550121251 - 2⁵ = 550121219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (550121651) 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 7 ways as a sum of consecutive naturals, for example, 18985 + ... + 38218.

It is an arithmetic number, because the mean of its divisors is an integer number (70360920).

Almost surely, 2^550121251 is an apocalyptic number.

550121251 is a deficient number, since it is larger than the sum of its proper divisors (12766109).

550121251 is a wasteful number, since it uses less digits than its factorization.

550121251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57425.

The product of its (nonzero) digits is 500, while the sum is 22.

The square root of 550121251 is about 23454.6637366644. The cubic root of 550121251 is about 819.3814743727.

It can be divided in two parts, 550 and 121251, that added together give a square (121801 = 349²).

The spelling of 550121251 in words is "five hundred fifty million, one hundred twenty-one thousand, two hundred fifty-one".