2181193 has 8 divisors (see below), whose sum is σ = 2501888. Its totient is φ = 1862784.

The previous prime is 2181173. The next prime is 2181203. The reversal of 2181193 is 3911812.

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

It is not a de Polignac number, because 2181193 - 2⁵ = 2181161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2181173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2905 + ... + 3577.

It is an arithmetic number, because the mean of its divisors is an integer number (312736).

2^2181193 is an apocalyptic number.

It is an amenable number.

2181193 is a deficient number, since it is larger than the sum of its proper divisors (320695).

2181193 is an equidigital number, since it uses as much as digits as its factorization.

2181193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1143.

The product of its digits is 432, while the sum is 25.

The square root of 2181193 is about 1476.8862515441. The cubic root of 2181193 is about 129.6874741278.

It can be divided in two parts, 21811 and 93, that added together give a square (21904 = 148²).

The spelling of 2181193 in words is "two million, one hundred eighty-one thousand, one hundred ninety-three".