206561834 has 8 divisors (see below), whose sum is σ = 309946368. Its totient is φ = 103246380.

The previous prime is 206561819. The next prime is 206561857. The reversal of 206561834 is 438165602.

206561834 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 206561794 and 206561803.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9002 + ... + 22229.

It is an arithmetic number, because the mean of its divisors is an integer number (38743296).

Almost surely, 2^206561834 is an apocalyptic number.

206561834 is a deficient number, since it is larger than the sum of its proper divisors (103384534).

206561834 is a wasteful number, since it uses less digits than its factorization.

206561834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34540.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 206561834 is about 14372.2591821884. The cubic root of 206561834 is about 591.1304897851.

The spelling of 206561834 in words is "two hundred six million, five hundred sixty-one thousand, eight hundred thirty-four".