2211646 has 4 divisors (see below), whose sum is σ = 3317472. Its totient is φ = 1105822.

The previous prime is 2211623. The next prime is 2211647. The reversal of 2211646 is 6461122.

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

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 552910 + ... + 552913.

It is an arithmetic number, because the mean of its divisors is an integer number (829368).

2^2211646 is an apocalyptic number.

2211646 is a deficient number, since it is larger than the sum of its proper divisors (1105826).

2211646 is a wasteful number, since it uses less digits than its factorization.

2211646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105825.

The product of its digits is 576, while the sum is 22.

The square root of 2211646 is about 1487.1603813981. The cubic root of 2211646 is about 130.2882361896.

Adding to 2211646 its reverse (6461122), we get a palindrome (8672768).

The spelling of 2211646 in words is "two million, two hundred eleven thousand, six hundred forty-six".