206115047 has 2 divisors, whose sum is σ = 206115048. Its totient is φ = 206115046.

The previous prime is 206114971. The next prime is 206115061. The reversal of 206115047 is 740511602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 206115047 - 2¹⁰ = 206114023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206115347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103057523 + 103057524.

It is an arithmetic number, because the mean of its divisors is an integer number (103057524).

Almost surely, 2^206115047 is an apocalyptic number.

206115047 is a deficient number, since it is larger than the sum of its proper divisors (1).

206115047 is an equidigital number, since it uses as much as digits as its factorization.

206115047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 206115047 is about 14356.7073871414. The cubic root of 206115047 is about 590.7039830060.

Adding to 206115047 its reverse (740511602), we get a palindrome (946626649).

The spelling of 206115047 in words is "two hundred six million, one hundred fifteen thousand, forty-seven".