4225023221 has 4 divisors (see below), whose sum is σ = 4227650700. Its totient is φ = 4222395744.

The previous prime is 4225023193. The next prime is 4225023223. The reversal of 4225023221 is 1223205224.

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 3328020721 + 897002500 = 57689^2 + 29950^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4225023221 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 (4225023223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1311326 + ... + 1314543.

It is an arithmetic number, because the mean of its divisors is an integer number (1056912675).

Almost surely, 2^4225023221 is an apocalyptic number.

It is an amenable number.

4225023221 is a deficient number, since it is larger than the sum of its proper divisors (2627479).

4225023221 is a wasteful number, since it uses less digits than its factorization.

4225023221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2627478.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 4225023221 is about 65000.1786228315. The cubic root of 4225023221 is about 1616.6265242781.

Adding to 4225023221 its reverse (1223205224), we get a palindrome (5448228445).

The spelling of 4225023221 in words is "four billion, two hundred twenty-five million, twenty-three thousand, two hundred twenty-one".