It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75131 = 7 ⋅10733.
It is a cyclic number.
It is an Ulam number.
It is a Duffinian number.
It is a nialpdrome in base 11.
It is a congruent number.
213157 is an apocalyptic number.
It is an amenable number.
13157 is an equidigital number, since it uses as much as digits as its factorization.
13157 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 282.
The square root of 13157 is about 114.7039668015. The cubic root of 13157 is about 23.6076246550.
Adding to 13157 its reverse (75131), we get a palindrome (88288).
The spelling of 13157 in words is "thirteen thousand, one hundred fifty-seven".