550020001 has 4 divisors (see below), whose sum is σ = 556646832. Its totient is φ = 543393172.

The previous prime is 550019993. The next prime is 550020019. The reversal of 550020001 is 100020055.

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, and also an emirpimes, since its reverse is a distinct semiprime: 100020055 = 5 ⋅20004011.

It is a cyclic number.

It is not a de Polignac number, because 550020001 - 2³ = 550019993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (550020101) 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, 3313291 + ... + 3313456.

It is an arithmetic number, because the mean of its divisors is an integer number (139161708).

Almost surely, 2^550020001 is an apocalyptic number.

It is an amenable number.

550020001 is a deficient number, since it is larger than the sum of its proper divisors (6626831).

550020001 is an equidigital number, since it uses as much as digits as its factorization.

550020001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6626830.

The product of its (nonzero) digits is 50, while the sum is 13.

The square root of 550020001 is about 23452.5052179932. The cubic root of 550020001 is about 819.3312021437.

Adding to 550020001 its reverse (100020055), we get a palindrome (650040056).

The spelling of 550020001 in words is "five hundred fifty million, twenty thousand, one".