2191206 has 8 divisors (see below), whose sum is σ = 4382424. Its totient is φ = 730400.

The previous prime is 2191199. The next prime is 2191229. The reversal of 2191206 is 6021912.

It is a sphenic number, since it is the product of 3 distinct primes.

2191206 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182595 + ... + 182606.

It is an arithmetic number, because the mean of its divisors is an integer number (547803).

2^2191206 is an apocalyptic number.

2191206 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2191206 is a wasteful number, since it uses less digits than its factorization.

2191206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365206.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 2191206 is about 1480.2722722526. The cubic root of 2191206 is about 129.8856193126.

The spelling of 2191206 in words is "two million, one hundred ninety-one thousand, two hundred six".