321225305 has 16 divisors (see below), whose sum is σ = 416729280. Its totient is φ = 236872512.

The previous prime is 321225301. The next prime is 321225313. The reversal of 321225305 is 503522123.

It is a cyclic number.

It is not a de Polignac number, because 321225305 - 2² = 321225301 is a prime.

It is not an unprimeable number, because it can be changed into a prime (321225301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42179 + ... + 49208.

It is an arithmetic number, because the mean of its divisors is an integer number (26045580).

Almost surely, 2^321225305 is an apocalyptic number.

It is an amenable number.

321225305 is a deficient number, since it is larger than the sum of its proper divisors (95503975).

321225305 is a wasteful number, since it uses less digits than its factorization.

321225305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91448.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 321225305 is about 17922.7594136617. The cubic root of 321225305 is about 684.8622842831.

Adding to 321225305 its reverse (503522123), we get a palindrome (824747428).

The spelling of 321225305 in words is "three hundred twenty-one million, two hundred twenty-five thousand, three hundred five".