321343225 has 18 divisors (see below), whose sum is σ = 463522974. Its totient is φ = 220348800.

The previous prime is 321343207. The next prime is 321343279. The reversal of 321343225 is 522343123.

It can be written as a sum of positive squares in 3 ways, for example, as 54641664 + 266701561 = 7392^2 + 16331^2 .

It is not a de Polignac number, because 321343225 - 2⁵ = 321343193 is a prime.

It is a super-2 number, since 2×321343225² = 206522936506801250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 321343225.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 129936 + ... + 132385.

Almost surely, 2^321343225 is an apocalyptic number.

321343225 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

321343225 is a deficient number, since it is larger than the sum of its proper divisors (142179749).

321343225 is a wasteful number, since it uses less digits than its factorization.

321343225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262345 (or 262333 counting only the distinct ones).

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

The square root of 321343225 is about 17926.0487838229. The cubic root of 321343225 is about 684.9460770596.

Adding to 321343225 its reverse (522343123), we get a palindrome (843686348).

The spelling of 321343225 in words is "three hundred twenty-one million, three hundred forty-three thousand, two hundred twenty-five".