2207891 has 16 divisors (see below), whose sum is σ = 2654400. Its totient is φ = 1834560.

The previous prime is 2207879. The next prime is 2207893. The reversal of 2207891 is 1987022.

It is a happy number.

It is not a de Polignac number, because 2207891 - 2¹⁴ = 2191507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2207893) 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, 13985 + ... + 14141.

It is an arithmetic number, because the mean of its divisors is an integer number (165900).

2^2207891 is an apocalyptic number.

2207891 is a deficient number, since it is larger than the sum of its proper divisors (446509).

2207891 is an equidigital number, since it uses as much as digits as its factorization.

2207891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219 (or 205 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 2207891 is about 1485.8973719608. The cubic root of 2207891 is about 130.2144586402.

The spelling of 2207891 in words is "two million, two hundred seven thousand, eight hundred ninety-one".