320321225 has 24 divisors (see below), whose sum is σ = 480647808. Its totient is φ = 206726400.

The previous prime is 320321203. The next prime is 320321227. The reversal of 320321225 is 522123023.

It is not a de Polignac number, because 320321225 - 2²⁰ = 319272649 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320321197 and 320321206.

It is not an unprimeable number, because it can be changed into a prime (320321227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50861 + ... + 56810.

It is an arithmetic number, because the mean of its divisors is an integer number (20026992).

Almost surely, 2^320321225 is an apocalyptic number.

320321225 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

320321225 is a deficient number, since it is larger than the sum of its proper divisors (160326583).

320321225 is a wasteful number, since it uses less digits than its factorization.

320321225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107705 (or 107700 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 320321225 is about 17897.5200796088. The cubic root of 320321225 is about 684.2191717246.

Adding to 320321225 its reverse (522123023), we get a palindrome (842444248).

The spelling of 320321225 in words is "three hundred twenty million, three hundred twenty-one thousand, two hundred twenty-five".