321222225 has 24 divisors (see below), whose sum is σ = 562330080. Its totient is φ = 161240320.

The previous prime is 321222199. The next prime is 321222269. The reversal of 321222225 is 522222123.

It is not a de Polignac number, because 321222225 - 2²¹ = 319125073 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 124695 + ... + 127244.

It is an arithmetic number, because the mean of its divisors is an integer number (23430420).

Almost surely, 2^321222225 is an apocalyptic number.

It is an amenable number.

321222225 is a deficient number, since it is larger than the sum of its proper divisors (241107855).

321222225 is a wasteful number, since it uses less digits than its factorization.

321222225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251969 (or 251964 counting only the distinct ones).

The product of its digits is 960, while the sum is 21.

The square root of 321222225 is about 17922.6734891868. The cubic root of 321222225 is about 684.8600953911.

Adding to 321222225 its reverse (522222123), we get a palindrome (843444348).

The spelling of 321222225 in words is "three hundred twenty-one million, two hundred twenty-two thousand, two hundred twenty-five".