206510215 has 16 divisors (see below), whose sum is σ = 260467200. Its totient is φ = 156876192.

The previous prime is 206510191. The next prime is 206510219. The reversal of 206510215 is 512015602.

It is a de Polignac number, because none of the positive numbers 2^k-206510215 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206510219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9526 + ... + 22444.

It is an arithmetic number, because the mean of its divisors is an integer number (16279200).

Almost surely, 2^206510215 is an apocalyptic number.

206510215 is a deficient number, since it is larger than the sum of its proper divisors (53956985).

206510215 is a wasteful number, since it uses less digits than its factorization.

206510215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13086.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 206510215 is about 14370.4632841116. The cubic root of 206510215 is about 591.0812452784.

Adding to 206510215 its reverse (512015602), we get a palindrome (718525817).

The spelling of 206510215 in words is "two hundred six million, five hundred ten thousand, two hundred fifteen".