206515147 has 2 divisors, whose sum is σ = 206515148. Its totient is φ = 206515146.

The previous prime is 206515139. The next prime is 206515151. The reversal of 206515147 is 741515602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 206515147 - 2³ = 206515139 is a prime.

It is not a weakly prime, because it can be changed into another prime (206515187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103257573 + 103257574.

It is an arithmetic number, because the mean of its divisors is an integer number (103257574).

Almost surely, 2^206515147 is an apocalyptic number.

206515147 is a deficient number, since it is larger than the sum of its proper divisors (1).

206515147 is an equidigital number, since it uses as much as digits as its factorization.

206515147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 206515147 is about 14370.6348850703. The cubic root of 206515147 is about 591.0859507591.

The spelling of 206515147 in words is "two hundred six million, five hundred fifteen thousand, one hundred forty-seven".