206551530 has 96 divisors (see below), whose sum is σ = 573640704. Its totient is φ = 51383808.

The previous prime is 206551483. The next prime is 206551537. The reversal of 206551530 is 35155602.

206551530 is a `hidden beast` number, since 2 + 0 + 655 + 1 + 5 + 3 + 0 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 206551494 and 206551503.

It is not an unprimeable number, because it can be changed into a prime (206551537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 193779 + ... + 194841.

It is an arithmetic number, because the mean of its divisors is an integer number (5975424).

Almost surely, 2^206551530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206551530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (286820352).

206551530 is an abundant number, since it is smaller than the sum of its proper divisors (367089174).

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

206551530 is a wasteful number, since it uses less digits than its factorization.

206551530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1220 (or 1217 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 206551530 is about 14371.9007093704. The cubic root of 206551530 is about 591.1206604284.

The spelling of 206551530 in words is "two hundred six million, five hundred fifty-one thousand, five hundred thirty".