550243181 has 2 divisors, whose sum is σ = 550243182. Its totient is φ = 550243180.

The previous prime is 550243151. The next prime is 550243189. The reversal of 550243181 is 181342055.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 364466281 + 185776900 = 19091^2 + 13630^2 .

It is a cyclic number.

It is not a de Polignac number, because 550243181 - 2²⁶ = 483134317 is a prime.

It is a super-2 number, since 2×550243181² = 605535116473997522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (550243189) 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 as a sum of consecutive naturals, namely, 275121590 + 275121591.

It is an arithmetic number, because the mean of its divisors is an integer number (275121591).

Almost surely, 2^550243181 is an apocalyptic number.

It is an amenable number.

550243181 is a deficient number, since it is larger than the sum of its proper divisors (1).

550243181 is an equidigital number, since it uses as much as digits as its factorization.

550243181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 550243181 is about 23457.2628624910. The cubic root of 550243181 is about 819.4420063632.

The spelling of 550243181 in words is "five hundred fifty million, two hundred forty-three thousand, one hundred eighty-one".