2271646 has 16 divisors (see below), whose sum is σ = 3760848. Its totient is φ = 1022400.

The previous prime is 2271637. The next prime is 2271673. The reversal of 2271646 is 6461722.

2271646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

2271646 is a nontrivial binomial coefficient, being equal to C(2132, 2).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1 + ... + 2131.

It is an arithmetic number, because the mean of its divisors is an integer number (235053).

2^2271646 is an apocalyptic number.

2271646 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2271646 is the 2131-st triangular number and also the 1066-th hexagonal number.

2271646 is the 711-st centered nonagonal number.

2271646 is a deficient number, since it is larger than the sum of its proper divisors (1489202).

2271646 is a wasteful number, since it uses less digits than its factorization.

2271646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2187.

The product of its digits is 4032, while the sum is 28.

The square root of 2271646 is about 1507.1980626315. The cubic root of 2271646 is about 131.4559409424.

The spelling of 2271646 in words is "two million, two hundred seventy-one thousand, six hundred forty-six".