206997056 has 56 divisors (see below), whose sum is σ = 489874560. Its totient is φ = 84851712.

The previous prime is 206997023. The next prime is 206997061. The reversal of 206997056 is 650799602.

It is a tau number, because it is divible by the number of its divisors (56).

It is a junction number, because it is equal to n+sod(n) for n = 206996998 and 206997016.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 260 + ... + 20348.

It is an arithmetic number, because the mean of its divisors is an integer number (8747760).

Almost surely, 2^206997056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206997056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (244937280).

206997056 is an abundant number, since it is smaller than the sum of its proper divisors (282877504).

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

206997056 is a wasteful number, since it uses less digits than its factorization.

206997056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20131 (or 20121 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 206997056 is about 14387.3922585019. The cubic root of 206997056 is about 591.5453655803.

The spelling of 206997056 in words is "two hundred six million, nine hundred ninety-seven thousand, fifty-six".