208157 has 4 divisors (see below), whose sum is σ = 213276. Its totient is φ = 203040.

The previous prime is 208147. The next prime is 208189. The reversal of 208157 is 751802.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 751802 = 2 ⋅375901.

It can be written as a sum of positive squares in 2 ways, for example, as 109561 + 98596 = 331^2 + 314^2 .

It is a cyclic number.

It is not a de Polignac number, because 208157 - 2⁴ = 208141 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 (208147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2498 + ... + 2579.

It is an arithmetic number, because the mean of its divisors is an integer number (53319).

2²⁰⁸¹⁵⁷ is an apocalyptic number.

It is an amenable number.

208157 is a deficient number, since it is larger than the sum of its proper divisors (5119).

208157 is an equidigital number, since it uses as much as digits as its factorization.

208157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5118.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 208157 is about 456.2422602083. The cubic root of 208157 is about 59.2648250511.

Adding to 208157 its reverse (751802), we get a palindrome (959959).

The spelling of 208157 in words is "two hundred eight thousand, one hundred fifty-seven".