206645530 has 64 divisors (see below), whose sum is σ = 468534528. Its totient is φ = 63866880.

The previous prime is 206645521. The next prime is 206645533. The reversal of 206645530 is 35546602.

It is a junction number, because it is equal to n+sod(n) for n = 206645492 and 206645501.

It is not an unprimeable number, because it can be changed into a prime (206645533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36490 + ... + 41770.

It is an arithmetic number, because the mean of its divisors is an integer number (7320852).

Almost surely, 2^206645530 is an apocalyptic number.

206645530 is an abundant number, since it is smaller than the sum of its proper divisors (261888998).

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

206645530 is a wasteful number, since it uses less digits than its factorization.

206645530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5351.

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 206645530 is about 14375.1706076832. The cubic root of 206645530 is about 591.2103183055.

The spelling of 206645530 in words is "two hundred six million, six hundred forty-five thousand, five hundred thirty".