206157 has 8 divisors (see below), whose sum is σ = 314176. Its totient is φ = 117792.

The previous prime is 206153. The next prime is 206177. The reversal of 206157 is 751602.

206157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 206157 - 2² = 206153 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 9817 = 206157 / (2 + 0 + 6 + 1 + 5 + 7).

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 206157.

It is not an unprimeable number, because it can be changed into a prime (206153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4888 + ... + 4929.

It is an arithmetic number, because the mean of its divisors is an integer number (39272).

2²⁰⁶¹⁵⁷ is an apocalyptic number.

It is an amenable number.

206157 is a deficient number, since it is larger than the sum of its proper divisors (108019).

206157 is an equidigital number, since it uses as much as digits as its factorization.

206157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9827.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 206157 is about 454.0451519398. The cubic root of 206157 is about 59.0744057911.

Adding to 206157 its reverse (751602), we get a palindrome (957759).

It can be divided in two parts, 206 and 157, that added together give a palindrome (363).

The spelling of 206157 in words is "two hundred six thousand, one hundred fifty-seven".