2181063 has 4 divisors (see below), whose sum is σ = 2908088. Its totient is φ = 1454040.

The previous prime is 2181031. The next prime is 2181071. The reversal of 2181063 is 3601812.

2181063 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 2181063 - 2⁵ = 2181031 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 (2181073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 363508 + ... + 363513.

It is an arithmetic number, because the mean of its divisors is an integer number (727022).

2^2181063 is an apocalyptic number.

2181063 is a deficient number, since it is larger than the sum of its proper divisors (727025).

2181063 is an equidigital number, since it uses as much as digits as its factorization.

2181063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727024.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 2181063 is about 1476.8422393743. The cubic root of 2181063 is about 129.6848976010.

Adding to 2181063 its reverse (3601812), we get a palindrome (5782875).

The spelling of 2181063 in words is "two million, one hundred eighty-one thousand, sixty-three".