2191057 has 8 divisors (see below), whose sum is σ = 2409120. Its totient is φ = 1976160.

The previous prime is 2191051. The next prime is 2191067. The reversal of 2191057 is 7501912.

2191057 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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2191057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2191051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 813 + ... + 2245.

It is an arithmetic number, because the mean of its divisors is an integer number (301140).

2^2191057 is an apocalyptic number.

It is an amenable number.

2191057 is a deficient number, since it is larger than the sum of its proper divisors (218063).

2191057 is a wasteful number, since it uses less digits than its factorization.

2191057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1583.

The product of its (nonzero) digits is 630, while the sum is 25.

The square root of 2191057 is about 1480.2219428180. The cubic root of 2191057 is about 129.8826752115.

Adding to 2191057 its reverse (7501912), we get a palindrome (9692969).

The spelling of 2191057 in words is "two million, one hundred ninety-one thousand, fifty-seven".