2081156 has 48 divisors (see below), whose sum is σ = 4717440. Its totient is φ = 779520.

The previous prime is 2081147. The next prime is 2081159. The reversal of 2081156 is 6511802.

2081156 = T₁ + T₂ + ... + T₂₃₁.

2081156 is a nontrivial binomial coefficient, being equal to C(233, 3).

It is a super-3 number, since 3×2081156³ = 27041772886444333248, which contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2081159) by changing a digit.

It is the 231-st tetrahedral number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8816 + ... + 9048.

It is an arithmetic number, because the mean of its divisors is an integer number (98280).

2^2081156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2081156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2358720).

2081156 is an abundant number, since it is smaller than the sum of its proper divisors (2636284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2081156 is a wasteful number, since it uses less digits than its factorization.

2081156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284 (or 282 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 2081156 is about 1442.6212254088. The cubic root of 2081156 is about 127.6737295943.

Adding to 2081156 its reverse (6511802), we get a palindrome (8592958).

The spelling of 2081156 in words is "two million, eighty-one thousand, one hundred fifty-six".