206157026 has 4 divisors (see below), whose sum is σ = 309235542. Its totient is φ = 103078512.

The previous prime is 206157023. The next prime is 206157047. The reversal of 206157026 is 620751602.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 202350625 + 3806401 = 14225^2 + 1951^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 206157026.

It is not an unprimeable number, because it can be changed into a prime (206157023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51539255 + ... + 51539258.

Almost surely, 2^206157026 is an apocalyptic number.

206157026 is a deficient number, since it is larger than the sum of its proper divisors (103078516).

206157026 is a wasteful number, since it uses less digits than its factorization.

206157026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103078515.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 206157026 is about 14358.1693122765. The cubic root of 206157026 is about 590.7440827457.

The spelling of 206157026 in words is "two hundred six million, one hundred fifty-seven thousand, twenty-six".