550000051 has 4 divisors (see below), whose sum is σ = 568965600. Its totient is φ = 531034504.

The previous prime is 550000021. The next prime is 550000091. The reversal of 550000051 is 150000055.

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 550000051 - 2²¹ = 547902899 is a prime.

It is a super-2 number, since 2×550000051² = 605000112200005202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (550000001) 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, 9482731 + ... + 9482788.

It is an arithmetic number, because the mean of its divisors is an integer number (142241400).

Almost surely, 2^550000051 is an apocalyptic number.

550000051 is a deficient number, since it is larger than the sum of its proper divisors (18965549).

550000051 is a wasteful number, since it uses less digits than its factorization.

550000051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18965548.

The product of its (nonzero) digits is 125, while the sum is 16.

The square root of 550000051 is about 23452.0798864408. The cubic root of 550000051 is about 819.3212959251.

The spelling of 550000051 in words is "five hundred fifty million, fifty-one", and thus it is an aban number.