2158 has 8 divisors (see below), whose sum is σ = 3528. Its totient is φ = 984.

The previous prime is 2153. The next prime is 2161. The reversal of 2158 is 8512.

It is a happy number.

2158 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 a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2153) by changing a digit.

2158 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16 + ... + 67.

It is an arithmetic number, because the mean of its divisors is an integer number (441).

2²¹⁵⁸ is an apocalyptic number.

2158 is a deficient number, since it is larger than the sum of its proper divisors (1370).

2158 is a wasteful number, since it uses less digits than its factorization.

2158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98.

The product of its digits is 80, while the sum is 16.

The square root of 2158 is about 46.4542785973. The cubic root of 2158 is about 12.9226172143.

The spelling of 2158 in words is "two thousand, one hundred fifty-eight".