550591985 has 4 divisors (see below), whose sum is σ = 660710388. Its totient is φ = 440473584.

The previous prime is 550591957. The next prime is 550592011. The reversal of 550591985 is 589195055.

550591985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 267780496 + 282811489 = 16364^2 + 16817^2 .

It is a cyclic number.

It is not a de Polignac number, because 550591985 - 2¹⁴ = 550575601 is a prime.

It is a Duffinian 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, 55059194 + ... + 55059203.

It is an arithmetic number, because the mean of its divisors is an integer number (165177597).

Almost surely, 2^550591985 is an apocalyptic number.

It is an amenable number.

550591985 is a deficient number, since it is larger than the sum of its proper divisors (110118403).

550591985 is a wasteful number, since it uses less digits than its factorization.

550591985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110118402.

The product of its (nonzero) digits is 405000, while the sum is 47.

The square root of 550591985 is about 23464.6965673967. The cubic root of 550591985 is about 819.6151202912.

The spelling of 550591985 in words is "five hundred fifty million, five hundred ninety-one thousand, nine hundred eighty-five".