550002161 has 2 divisors, whose sum is σ = 550002162.
Its totient is φ = 550002160.
The previous prime is 550002137. The next prime is 550002179. The reversal of 550002161 is 161200055.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 539400625 + 10601536 = 23225^2 + 3256^2
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-550002161 is a prime.
It is a Chen prime.
It is not a weakly prime, because it can be changed into another prime (550002191) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275001080 + 275001081.
It is an arithmetic number, because the mean of its divisors is an integer number (275001081).
Almost surely, 2550002161 is an apocalyptic number.
It is an amenable number.
550002161 is a deficient number, since it is larger than the sum of its proper divisors (1).
550002161 is an equidigital number, since it uses as much as digits as its factorization.
550002161 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 300, while the sum is 20.
The square root of 550002161 is about 23452.1248717467.
The cubic root of 550002161 is about 819.3223436618.
The spelling of 550002161 in words is "five hundred fifty million, two thousand, one hundred sixty-one".