2191013 has 8 divisors (see below), whose sum is σ = 2400960. Its totient is φ = 1982880.

The previous prime is 2191001. The next prime is 2191019. The reversal of 2191013 is 3101912.

It is a happy number.

2191013 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 not a de Polignac number, because 2191013 - 2⁴ = 2190997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2190982 and 2191000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2191019) 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, 4256 + ... + 4742.

It is an arithmetic number, because the mean of its divisors is an integer number (300120).

2^2191013 is an apocalyptic number.

It is an amenable number.

2191013 is a deficient number, since it is larger than the sum of its proper divisors (209947).

2191013 is a wasteful number, since it uses less digits than its factorization.

2191013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 2191013 is about 1480.2070801074. The cubic root of 2191013 is about 129.8818057870.

Adding to 2191013 its reverse (3101912), we get a palindrome (5292925).

The spelling of 2191013 in words is "two million, one hundred ninety-one thousand, thirteen".