2135 has 8 divisors (see below), whose sum is σ = 2976. Its totient is φ = 1440.

The previous prime is 2131. The next prime is 2137. The reversal of 2135 is 5312.

2135 = T₁₀ + T₁₁ + ... + T₂₃.

2135 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 2135 - 2² = 2131 is a prime.

It is a d-powerful number, because it can be written as 2¹¹ + 3⁴ + 1 + 5 .

It is a Duffinian number.

It is a plaindrome in base 12.

It is a nialpdrome in base 13 and base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131) 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, 5 + ... + 65.

It is an arithmetic number, because the mean of its divisors is an integer number (372).

2135 is a deficient number, since it is larger than the sum of its proper divisors (841).

2135 is an equidigital number, since it uses as much as digits as its factorization.

2135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73.

The product of its digits is 30, while the sum is 11.

The square root of 2135 is about 46.2060602086. The cubic root of 2135 is about 12.8765433158.

Adding to 2135 its reverse (5312), we get a palindrome (7447).

The spelling of 2135 in words is "two thousand, one hundred thirty-five".