206730515 has 4 divisors (see below), whose sum is σ = 248076624. Its totient is φ = 165384408.

The previous prime is 206730481. The next prime is 206730529. The reversal of 206730515 is 515037602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 206730515 - 2⁸ = 206730259 is a prime.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 20673047 + ... + 20673056.

It is an arithmetic number, because the mean of its divisors is an integer number (62019156).

Almost surely, 2^206730515 is an apocalyptic number.

206730515 is a deficient number, since it is larger than the sum of its proper divisors (41346109).

206730515 is an equidigital number, since it uses as much as digits as its factorization.

206730515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41346108.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 206730515 is about 14378.1262687459. The cubic root of 206730515 is about 591.2913542106.

The spelling of 206730515 in words is "two hundred six million, seven hundred thirty thousand, five hundred fifteen".