550555009 has 4 divisors (see below), whose sum is σ = 568314880. Its totient is φ = 532795140.

The previous prime is 550555007. The next prime is 550555021. The reversal of 550555009 is 900555055.

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 550555009 - 2¹ = 550555007 is a prime.

It is a super-2 number, since 2×550555009² = 606221635869980162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (550555003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8879889 + ... + 8879950.

It is an arithmetic number, because the mean of its divisors is an integer number (142078720).

Almost surely, 2^550555009 is an apocalyptic number.

It is an amenable number.

550555009 is a deficient number, since it is larger than the sum of its proper divisors (17759871).

550555009 is a wasteful number, since it uses less digits than its factorization.

550555009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17759870.

The product of its (nonzero) digits is 28125, while the sum is 34.

The square root of 550555009 is about 23463.9086471116. The cubic root of 550555009 is about 819.5967723021.

The spelling of 550555009 in words is "five hundred fifty million, five hundred fifty-five thousand, nine".