2206091 has 4 divisors (see below), whose sum is σ = 2302032. Its totient is φ = 2110152.

The previous prime is 2206081. The next prime is 2206093. The reversal of 2206091 is 1906022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2206091 - 2¹⁰ = 2205067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2206093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47936 + ... + 47981.

It is an arithmetic number, because the mean of its divisors is an integer number (575508).

2^2206091 is an apocalyptic number.

2206091 is a deficient number, since it is larger than the sum of its proper divisors (95941).

2206091 is an equidigital number, since it uses as much as digits as its factorization.

2206091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95940.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 2206091 is about 1485.2915538708. The cubic root of 2206091 is about 130.1790629089.

The spelling of 2206091 in words is "two million, two hundred six thousand, ninety-one".