2208206091 has 16 divisors (see below), whose sum is σ = 3623723264. Its totient is φ = 1164767904.

The previous prime is 2208206089. The next prime is 2208206101. The reversal of 2208206091 is 1906028022.

It is not a de Polignac number, because 2208206091 - 2¹ = 2208206089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2208206491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4044061 + ... + 4044606.

It is an arithmetic number, because the mean of its divisors is an integer number (226482704).

Almost surely, 2^2208206091 is an apocalyptic number.

2208206091 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2208206091 is a deficient number, since it is larger than the sum of its proper divisors (1415517173).

2208206091 is a wasteful number, since it uses less digits than its factorization.

2208206091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8088690.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 2208206091 is about 46991.5534005847. The cubic root of 2208206091 is about 1302.2065270388.

The spelling of 2208206091 in words is "two billion, two hundred eight million, two hundred six thousand, ninety-one".