206156196 has 18 divisors (see below), whose sum is σ = 521117142. Its totient is φ = 68718720.

The previous prime is 206156189. The next prime is 206156219. The reversal of 206156196 is 691651602.

206156196 is a `hidden beast` number, since 2 + 0 + 6 + 1 + 561 + 96 = 666.

It can be written as a sum of positive squares in only one way, i.e., 139570596 + 66585600 = 11814^2 + 8160^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 5726561 = 206156196 / (2 + 0 + 6 + 1 + 5 + 6 + 1 + 9 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 206156196.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2863245 + ... + 2863316.

Almost surely, 2^206156196 is an apocalyptic number.

It is an amenable number.

206156196 is an abundant number, since it is smaller than the sum of its proper divisors (314960946).

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

206156196 is a wasteful number, since it uses less digits than its factorization.

206156196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5726571 (or 5726566 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 206156196 is about 14358.1404088413. The cubic root of 206156196 is about 590.7432899548.

The spelling of 206156196 in words is "two hundred six million, one hundred fifty-six thousand, one hundred ninety-six".