2221345 has 8 divisors (see below), whose sum is σ = 3046464. Its totient is φ = 1523184.

The previous prime is 2221343. The next prime is 2221379. The reversal of 2221345 is 5431222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2221345 - 2¹ = 2221343 is a prime.

It is a d-powerful number, because it can be written as 2⁵ + 2¹³ + 2¹⁹ + 1 + 3¹³ + 4⁷ + 5⁷ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2221343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31699 + ... + 31768.

It is an arithmetic number, because the mean of its divisors is an integer number (380808).

2^2221345 is an apocalyptic number.

It is an amenable number.

2221345 is a deficient number, since it is larger than the sum of its proper divisors (825119).

2221345 is an equidigital number, since it uses as much as digits as its factorization.

2221345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63479.

The product of its digits is 480, while the sum is 19.

The square root of 2221345 is about 1490.4177266793. The cubic root of 2221345 is about 130.4784147346.

Adding to 2221345 its reverse (5431222), we get a palindrome (7652567).

The spelling of 2221345 in words is "two million, two hundred twenty-one thousand, three hundred forty-five".