2186143 has 6 divisors (see below), whose sum is σ = 2223816. Its totient is φ = 2149092.

The previous prime is 2186141. The next prime is 2186189. The reversal of 2186143 is 3416812.

It is not a de Polignac number, because 2186143 - 2¹ = 2186141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2186141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4246 + ... + 4732.

It is an arithmetic number, because the mean of its divisors is an integer number (370636).

2^2186143 is an apocalyptic number.

2186143 is a deficient number, since it is larger than the sum of its proper divisors (37673).

2186143 is an frugal number, since it uses more digits than its factorization.

2186143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621 (or 554 counting only the distinct ones).

The product of its digits is 1152, while the sum is 25.

The square root of 2186143 is about 1478.5611248778. The cubic root of 2186143 is about 129.7855042719.

It can be divided in two parts, 21861 and 43, that added together give a square (21904 = 148²).

The spelling of 2186143 in words is "two million, one hundred eighty-six thousand, one hundred forty-three".