206561334 has 64 divisors (see below), whose sum is σ = 485222400. Its totient is φ = 57399168.

The previous prime is 206561297. The next prime is 206561347. The reversal of 206561334 is 433165602.

206561334 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 530812 + ... + 531200.

It is an arithmetic number, because the mean of its divisors is an integer number (7581600).

Almost surely, 2^206561334 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206561334, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242611200).

206561334 is an abundant number, since it is smaller than the sum of its proper divisors (278661066).

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

206561334 is a wasteful number, since it uses less digits than its factorization.

206561334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 206561334 is about 14372.2417875570. The cubic root of 206561334 is about 591.1300128246.

The spelling of 206561334 in words is "two hundred six million, five hundred sixty-one thousand, three hundred thirty-four".