550421005 has 4 divisors (see below), whose sum is σ = 660505212. Its totient is φ = 440336800.

The previous prime is 550420999. The next prime is 550421041. The reversal of 550421005 is 500124055.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 340808521 + 209612484 = 18461^2 + 14478^2 .

It is not a de Polignac number, because 550421005 - 2⁷ = 550420877 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55042096 + ... + 55042105.

It is an arithmetic number, because the mean of its divisors is an integer number (165126303).

Almost surely, 2^550421005 is an apocalyptic number.

It is an amenable number.

550421005 is a deficient number, since it is larger than the sum of its proper divisors (110084207).

550421005 is a wasteful number, since it uses less digits than its factorization.

550421005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110084206.

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 550421005 is about 23461.0529388602. The cubic root of 550421005 is about 819.5302708287.

The spelling of 550421005 in words is "five hundred fifty million, four hundred twenty-one thousand, five".