206571157 has 16 divisors (see below), whose sum is σ = 231517440. Its totient is φ = 183074112.

The previous prime is 206571133. The next prime is 206571187. The reversal of 206571157 is 751175602.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-206571157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206571187) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29194 + ... + 35572.

It is an arithmetic number, because the mean of its divisors is an integer number (14469840).

Almost surely, 2^206571157 is an apocalyptic number.

It is an amenable number.

206571157 is a deficient number, since it is larger than the sum of its proper divisors (24946283).

206571157 is a wasteful number, since it uses less digits than its factorization.

206571157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6492.

The product of its (nonzero) digits is 14700, while the sum is 34.

The square root of 206571157 is about 14372.5835186302. The cubic root of 206571157 is about 591.1393830489.

The spelling of 206571157 in words is "two hundred six million, five hundred seventy-one thousand, one hundred fifty-seven".