2156113 has 4 divisors (see below), whose sum is σ = 2164068. Its totient is φ = 2148160.

The previous prime is 2156111. The next prime is 2156117. The reversal of 2156113 is 3116512.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1411344 + 744769 = 1188^2 + 863^2 .

It is a cyclic number.

It is not a de Polignac number, because 2156113 - 2¹ = 2156111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2156111) 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, 3556 + ... + 4117.

It is an arithmetic number, because the mean of its divisors is an integer number (541017).

2^2156113 is an apocalyptic number.

It is an amenable number.

2156113 is a deficient number, since it is larger than the sum of its proper divisors (7955).

2156113 is an equidigital number, since it uses as much as digits as its factorization.

2156113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7954.

The product of its digits is 180, while the sum is 19.

The square root of 2156113 is about 1468.3708659600. The cubic root of 2156113 is about 129.1884951431.

It can be divided in two parts, 215 and 6113, that added together give a triangular number (6328 = T₁₁₂).

The spelling of 2156113 in words is "two million, one hundred fifty-six thousand, one hundred thirteen".