320543225 has 6 divisors (see below), whose sum is σ = 397473630. Its totient is φ = 256434560.

The previous prime is 320543221. The next prime is 320543233. The reversal of 320543225 is 522345023.

It can be written as a sum of positive squares in 3 ways, for example, as 109160704 + 211382521 = 10448^2 + 14539^2 .

It is not a de Polignac number, because 320543225 - 2² = 320543221 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 320543194 and 320543203.

It is not an unprimeable number, because it can be changed into a prime (320543221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6410840 + ... + 6410889.

It is an arithmetic number, because the mean of its divisors is an integer number (66245605).

Almost surely, 2^320543225 is an apocalyptic number.

It is an amenable number.

320543225 is a deficient number, since it is larger than the sum of its proper divisors (76930405).

320543225 is a wasteful number, since it uses less digits than its factorization.

320543225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12821739 (or 12821734 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 26.

The square root of 320543225 is about 17903.7209819635. The cubic root of 320543225 is about 684.3772022336.

Adding to 320543225 its reverse (522345023), we get a palindrome (842888248).

The spelling of 320543225 in words is "three hundred twenty million, five hundred forty-three thousand, two hundred twenty-five".