2191107 has 8 divisors (see below), whose sum is σ = 2928384. Its totient is φ = 1457288.

The previous prime is 2191097. The next prime is 2191121. The reversal of 2191107 is 7011912.

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 2191107 - 2¹² = 2187011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2191127) 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, 1738 + ... + 2720.

It is an arithmetic number, because the mean of its divisors is an integer number (366048).

2^2191107 is an apocalyptic number.

2191107 is a deficient number, since it is larger than the sum of its proper divisors (737277).

2191107 is an equidigital number, since it uses as much as digits as its factorization.

2191107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1729.

The product of its (nonzero) digits is 126, while the sum is 21.

The square root of 2191107 is about 1480.2388320808. The cubic root of 2191107 is about 129.8836631798.

It can be divided in two parts, 219 and 1107, that added together give a triangular number (1326 = T₅₁).

The spelling of 2191107 in words is "two million, one hundred ninety-one thousand, one hundred seven".