3223645 has 4 divisors (see below), whose sum is σ = 3868380. Its totient is φ = 2578912.

The previous prime is 3223631. The next prime is 3223663. The reversal of 3223645 is 5463223.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 870489 + 2353156 = 933^2 + 1534^2 .

It is a cyclic number.

It is not a de Polignac number, because 3223645 - 2¹⁹ = 2699357 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322360 + ... + 322369.

It is an arithmetic number, because the mean of its divisors is an integer number (967095).

Almost surely, 2^3223645 is an apocalyptic number.

It is an amenable number.

3223645 is a deficient number, since it is larger than the sum of its proper divisors (644735).

3223645 is an equidigital number, since it uses as much as digits as its factorization.

3223645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644734.

The product of its digits is 4320, while the sum is 25.

The square root of 3223645 is about 1795.4511967748. The cubic root of 3223645 is about 147.7233234878.

Adding to 3223645 its reverse (5463223), we get a palindrome (8686868).

The spelling of 3223645 in words is "three million, two hundred twenty-three thousand, six hundred forty-five".