550512161 has 2 divisors, whose sum is σ = 550512162. Its totient is φ = 550512160.

The previous prime is 550512121. The next prime is 550512217. The reversal of 550512161 is 161215055.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 481539136 + 68973025 = 21944^2 + 8305^2 .

It is a cyclic number.

It is not a de Polignac number, because 550512161 - 2¹⁸ = 550250017 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 550512161.

It is not a weakly prime, because it can be changed into another prime (550512121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275256080 + 275256081.

It is an arithmetic number, because the mean of its divisors is an integer number (275256081).

Almost surely, 2^550512161 is an apocalyptic number.

It is an amenable number.

550512161 is a deficient number, since it is larger than the sum of its proper divisors (1).

550512161 is an equidigital number, since it uses as much as digits as its factorization.

550512161 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 550512161 is about 23462.9955674888. The cubic root of 550512161 is about 819.5755095200.

The spelling of 550512161 in words is "five hundred fifty million, five hundred twelve thousand, one hundred sixty-one".