2271664 has 20 divisors (see below), whose sum is σ = 4593456. Its totient is φ = 1086272.

The previous prime is 2271637. The next prime is 2271673. The reversal of 2271664 is 4661722.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2719 + ... + 3454.

2^2271664 is an apocalyptic number.

It is an amenable number.

2271664 is an abundant number, since it is smaller than the sum of its proper divisors (2321792).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2271664 is a wasteful number, since it uses less digits than its factorization.

2271664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6204 (or 6198 counting only the distinct ones).

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

The square root of 2271664 is about 1507.2040339649. The cubic root of 2271664 is about 131.4562881503.

It can be divided in two parts, 227 and 1664, that added together give a triangular number (1891 = T₆₁).

The spelling of 2271664 in words is "two million, two hundred seventy-one thousand, six hundred sixty-four".