2221307 has 4 divisors (see below), whose sum is σ = 2423256. Its totient is φ = 2019360.

The previous prime is 2221301. The next prime is 2221321. The reversal of 2221307 is 7031222.

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

It is a cyclic number.

It is not a de Polignac number, because 2221307 - 2¹² = 2217211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2221301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100958 + ... + 100979.

It is an arithmetic number, because the mean of its divisors is an integer number (605814).

2^2221307 is an apocalyptic number.

2221307 is a deficient number, since it is larger than the sum of its proper divisors (201949).

2221307 is a wasteful number, since it uses less digits than its factorization.

2221307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201948.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 2221307 is about 1490.4049785209. The cubic root of 2221307 is about 130.4776707097.

Adding to 2221307 its reverse (7031222), we get a palindrome (9252529).

The spelling of 2221307 in words is "two million, two hundred twenty-one thousand, three hundred seven".