550311021 has 24 divisors (see below), whose sum is σ = 857316096. Its totient is φ = 338148000.

The previous prime is 550311019. The next prime is 550311023. The reversal of 550311021 is 120113055.

550311021 is a `hidden beast` number, since 550 + 3 + 110 + 2 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (550311019) and next prime (550311023).

It is not a de Polignac number, because 550311021 - 2¹ = 550311019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 550310985 and 550311003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550311023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 84736 + ... + 90998.

It is an arithmetic number, because the mean of its divisors is an integer number (35721504).

Almost surely, 2^550311021 is an apocalyptic number.

It is an amenable number.

550311021 is a deficient number, since it is larger than the sum of its proper divisors (307005075).

550311021 is a wasteful number, since it uses less digits than its factorization.

550311021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7033 (or 7030 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 550311021 is about 23458.7088519381. The cubic root of 550311021 is about 819.4756815715.

Adding to 550311021 its reverse (120113055), we get a palindrome (670424076).

The spelling of 550311021 in words is "five hundred fifty million, three hundred eleven thousand, twenty-one".