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550940081 = 2663206887
BaseRepresentation
bin100000110101101…
…010110110110001
31102101200122201012
4200311222312301
52112020040311
6130400320305
716436625206
oct4065526661
91371618635
10550940081
11262a9a48a
12134613095
138a1ac363
1453255cad
153357b78b
hex20d6adb1

550940081 has 4 divisors (see below), whose sum is σ = 551149632. Its totient is φ = 550730532.

The previous prime is 550940077. The next prime is 550940087. The reversal of 550940081 is 180049055.

550940081 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, 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: 180049055 = 536009811.

It is a cyclic number.

It is not a de Polignac number, because 550940081 - 22 = 550940077 is a prime.

It is a super-2 number, since 2×5509400812 = 607069945704573122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (550940087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100781 + ... + 106106.

It is an arithmetic number, because the mean of its divisors is an integer number (137787408).

Almost surely, 2550940081 is an apocalyptic number.

It is an amenable number.

550940081 is a deficient number, since it is larger than the sum of its proper divisors (209551).

550940081 is a wasteful number, since it uses less digits than its factorization.

550940081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209550.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 550940081 is about 23472.1128363000. The cubic root of 550940081 is about 819.7878099589.

The spelling of 550940081 in words is "five hundred fifty million, nine hundred forty thousand, eighty-one".

Divisors: 1 2663 206887 550940081