206151017 has 2 divisors, whose sum is σ = 206151018. Its totient is φ = 206151016.

The previous prime is 206150983. The next prime is 206151019. The reversal of 206151017 is 710151602.

206151017 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189998656 + 16152361 = 13784^2 + 4019^2 .

It is a cyclic number.

It is not a de Polignac number, because 206151017 - 2⁶ = 206150953 is a prime.

Together with 206151019, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 206150983 and 206151001.

It is not a weakly prime, because it can be changed into another prime (206151019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103075508 + 103075509.

It is an arithmetic number, because the mean of its divisors is an integer number (103075509).

Almost surely, 2^206151017 is an apocalyptic number.

It is an amenable number.

206151017 is a deficient number, since it is larger than the sum of its proper divisors (1).

206151017 is an equidigital number, since it uses as much as digits as its factorization.

206151017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 420, while the sum is 23.

The square root of 206151017 is about 14357.9600570555. The cubic root of 206151017 is about 590.7383430825.

The spelling of 206151017 in words is "two hundred six million, one hundred fifty-one thousand, seventeen".