2221606 has 4 divisors (see below), whose sum is σ = 3332412. Its totient is φ = 1110802.

The previous prime is 2221589. The next prime is 2221631. The reversal of 2221606 is 6061222.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555400 + ... + 555403.

It is an arithmetic number, because the mean of its divisors is an integer number (833103).

2^2221606 is an apocalyptic number.

2221606 is a deficient number, since it is larger than the sum of its proper divisors (1110806).

2221606 is a wasteful number, since it uses less digits than its factorization.

2221606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110805.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 2221606 is about 1490.5052834526. The cubic root of 2221606 is about 130.4835247817.

Adding to 2221606 its reverse (6061222), we get a palindrome (8282828).

The spelling of 2221606 in words is "two million, two hundred twenty-one thousand, six hundred six".