2221207 has 4 divisors (see below), whose sum is σ = 2226256. Its totient is φ = 2216160.

The previous prime is 2221187. The next prime is 2221217. The reversal of 2221207 is 7021222.

2221207 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2221207 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 (2221217) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1794 + ... + 2767.

It is an arithmetic number, because the mean of its divisors is an integer number (556564).

2^2221207 is an apocalyptic number.

2221207 is a deficient number, since it is larger than the sum of its proper divisors (5049).

2221207 is an equidigital number, since it uses as much as digits as its factorization.

2221207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5048.

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 2221207 is about 1490.3714302146. The cubic root of 2221207 is about 130.4757127088.

Adding to 2221207 its reverse (7021222), we get a palindrome (9242429).

The spelling of 2221207 in words is "two million, two hundred twenty-one thousand, two hundred seven".