206512215 has 48 divisors (see below), whose sum is σ = 413951328. Its totient is φ = 87139584.

The previous prime is 206512181. The next prime is 206512253. The reversal of 206512215 is 512215602.

It is a happy number.

It is not a de Polignac number, because 206512215 - 2⁶ = 206512151 is a prime.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 1252 + ... + 20361.

It is an arithmetic number, because the mean of its divisors is an integer number (8623986).

Almost surely, 2^206512215 is an apocalyptic number.

206512215 is an abundant number, since it is smaller than the sum of its proper divisors (207439113).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

206512215 is a wasteful number, since it uses less digits than its factorization.

206512215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21648 (or 21641 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 206512215 is about 14370.5328711221. The cubic root of 206512215 is about 591.0831534305.

Adding to 206512215 its reverse (512215602), we get a palindrome (718727817).

The spelling of 206512215 in words is "two hundred six million, five hundred twelve thousand, two hundred fifteen".