550021685 has 16 divisors (see below), whose sum is σ = 704816640. Its totient is φ = 411136320.

The previous prime is 550021679. The next prime is 550021699. The reversal of 550021685 is 586120055.

550021685 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 550021685 - 2⁴ = 550021669 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56687 + ... + 65676.

It is an arithmetic number, because the mean of its divisors is an integer number (44051040).

Almost surely, 2^550021685 is an apocalyptic number.

It is an amenable number.

550021685 is a deficient number, since it is larger than the sum of its proper divisors (154794955).

550021685 is a wasteful number, since it uses less digits than its factorization.

550021685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122428.

The product of its (nonzero) digits is 12000, while the sum is 32.

The square root of 550021685 is about 23452.5411203136. The cubic root of 550021685 is about 819.3320383269.

The spelling of 550021685 in words is "five hundred fifty million, twenty-one thousand, six hundred eighty-five".