2191056 has 40 divisors (see below), whose sum is σ = 6469824. Its totient is φ = 625920.

The previous prime is 2191051. The next prime is 2191067. The reversal of 2191056 is 6501912.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2191051) 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, 2925 + ... + 3596.

2^2191056 is an apocalyptic number.

It is an amenable number.

2191056 is an abundant number, since it is smaller than the sum of its proper divisors (4278768).

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

2191056 is a wasteful number, since it uses less digits than its factorization.

2191056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6539 (or 6533 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 2191056 is about 1480.2216050308. The cubic root of 2191056 is about 129.8826554520.

Adding to 2191056 its reverse (6501912), we get a palindrome (8692968).

It can be divided in two parts, 219 and 1056, that added together give a triangular number (1275 = T₅₀).

The spelling of 2191056 in words is "two million, one hundred ninety-one thousand, fifty-six".