206155500 has 48 divisors (see below), whose sum is σ = 600329184. Its totient is φ = 54974400.

The previous prime is 206155493. The next prime is 206155501. The reversal of 206155500 is 5551602.

206155500 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

206155500 is strictly pandigital in base 9.

It is not an unprimeable number, because it can be changed into a prime (206155501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67219 + ... + 70218.

It is an arithmetic number, because the mean of its divisors is an integer number (12506858).

Almost surely, 2^206155500 is an apocalyptic number.

206155500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206155500 is an abundant number, since it is smaller than the sum of its proper divisors (394173684).

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

206155500 is a wasteful number, since it uses less digits than its factorization.

206155500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137459 (or 137447 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 206155500 is about 14358.1161716988. The cubic root of 206155500 is about 590.7426251550.

The spelling of 206155500 in words is "two hundred six million, one hundred fifty-five thousand, five hundred".