2291156 has 24 divisors (see below), whose sum is σ = 4682496. Its totient is φ = 960480.

The previous prime is 2291143. The next prime is 2291167. The reversal of 2291156 is 6511922.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 446 + ... + 2186.

It is an arithmetic number, because the mean of its divisors is an integer number (195104).

2^2291156 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 2291156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2341248).

2291156 is an abundant number, since it is smaller than the sum of its proper divisors (2391340).

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

2291156 is a wasteful number, since it uses less digits than its factorization.

2291156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1799 (or 1797 counting only the distinct ones).

The product of its digits is 1080, while the sum is 26.

The square root of 2291156 is about 1513.6565000026. The cubic root of 2291156 is about 131.8312045074.

The spelling of 2291156 in words is "two million, two hundred ninety-one thousand, one hundred fifty-six".