550215161 has 2 divisors, whose sum is σ = 550215162. Its totient is φ = 550215160.

The previous prime is 550215157. The next prime is 550215209. The reversal of 550215161 is 161512055.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 547794025 + 2421136 = 23405^2 + 1556^2 .

It is a cyclic number.

It is not a de Polignac number, because 550215161 - 2² = 550215157 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 550215161.

It is not a weakly prime, because it can be changed into another prime (550215151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275107580 + 275107581.

It is an arithmetic number, because the mean of its divisors is an integer number (275107581).

Almost surely, 2^550215161 is an apocalyptic number.

It is an amenable number.

550215161 is a deficient number, since it is larger than the sum of its proper divisors (1).

550215161 is an equidigital number, since it uses as much as digits as its factorization.

550215161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1500, while the sum is 26.

The square root of 550215161 is about 23456.6655985031. The cubic root of 550215161 is about 819.4280966619.

The spelling of 550215161 in words is "five hundred fifty million, two hundred fifteen thousand, one hundred sixty-one".