2081199 has 4 divisors (see below), whose sum is σ = 2774936. Its totient is φ = 1387464.

The previous prime is 2081171. The next prime is 2081237. The reversal of 2081199 is 9911802.

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

It is a de Polignac number, because none of the positive numbers 2^k-2081199 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2081129) 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, 346864 + ... + 346869.

It is an arithmetic number, because the mean of its divisors is an integer number (693734).

2^2081199 is an apocalyptic number.

2081199 is a deficient number, since it is larger than the sum of its proper divisors (693737).

2081199 is an equidigital number, since it uses as much as digits as its factorization.

2081199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693736.

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 2081199 is about 1442.6361287587. The cubic root of 2081199 is about 127.6746089025.

It can be divided in two parts, 20811 and 99, that added together give a triangular number (20910 = T₂₀₄).

The spelling of 2081199 in words is "two million, eighty-one thousand, one hundred ninety-nine".