206515151 has 2 divisors, whose sum is σ = 206515152. Its totient is φ = 206515150.

The previous prime is 206515147. The next prime is 206515159. The reversal of 206515151 is 151515602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 206515151 - 2² = 206515147 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 206515151.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206515159) 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, 103257575 + 103257576.

It is an arithmetic number, because the mean of its divisors is an integer number (103257576).

Almost surely, 2^206515151 is an apocalyptic number.

206515151 is a deficient number, since it is larger than the sum of its proper divisors (1).

206515151 is an equidigital number, since it uses as much as digits as its factorization.

206515151 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 206515151 is about 14370.6350242430. The cubic root of 206515151 is about 591.0859545754.

The spelling of 206515151 in words is "two hundred six million, five hundred fifteen thousand, one hundred fifty-one".