206523530 has 16 divisors (see below), whose sum is σ = 371921760. Its totient is φ = 82569552.

The previous prime is 206523503. The next prime is 206523533. The reversal of 206523530 is 35325602.

It is a self number, because there is not a number n which added to its sum of digits gives 206523530.

It is not an unprimeable number, because it can be changed into a prime (206523533) 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 7 ways as a sum of consecutive naturals, for example, 25877 + ... + 32903.

It is an arithmetic number, because the mean of its divisors is an integer number (23245110).

Almost surely, 2^206523530 is an apocalyptic number.

206523530 is a deficient number, since it is larger than the sum of its proper divisors (165398230).

206523530 is a wasteful number, since it uses less digits than its factorization.

206523530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9973.

The product of its (nonzero) digits is 5400, while the sum is 26.

The square root of 206523530 is about 14370.9265532881. The cubic root of 206523530 is about 591.0939485687.

The spelling of 206523530 in words is "two hundred six million, five hundred twenty-three thousand, five hundred thirty".