2191326 has 16 divisors (see below), whose sum is σ = 4397328. Its totient is φ = 728000.

The previous prime is 2191291. The next prime is 2191331. The reversal of 2191326 is 6231912.

2191326 = 229² + 230² + ... + 264².

2191326 is nontrivially palindromic in base 5.

It is a junction number, because it is equal to n+sod(n) for n = 2191296 and 2191305.

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, 2776 + ... + 3476.

It is an arithmetic number, because the mean of its divisors is an integer number (274833).

2^2191326 is an apocalyptic number.

2191326 is an abundant number, since it is smaller than the sum of its proper divisors (2206002).

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

2191326 is a wasteful number, since it uses less digits than its factorization.

2191326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1227.

The product of its digits is 648, while the sum is 24.

The square root of 2191326 is about 1480.3128047815. The cubic root of 2191326 is about 129.8879903037.

The spelling of 2191326 in words is "two million, one hundred ninety-one thousand, three hundred twenty-six".