320442025 has 18 divisors (see below), whose sum is σ = 411549242. Its totient is φ = 247497600.

The previous prime is 320441983. The next prime is 320442029. The reversal of 320442025 is 520244023.

It can be written as a sum of positive squares in 9 ways, for example, as 38638656 + 281803369 = 6216^2 + 16787^2 .

It is a de Polignac number, because none of the positive numbers 2^k-320442025 is a prime.

It is a super-2 number, since 2×320442025² = 205366182772201250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320441987 and 320442005.

It is not an unprimeable number, because it can be changed into a prime (320442029) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 13405 + ... + 28645.

Almost surely, 2^320442025 is an apocalyptic number.

It is an amenable number.

320442025 is a deficient number, since it is larger than the sum of its proper divisors (91107217).

320442025 is a wasteful number, since it uses less digits than its factorization.

320442025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15309 (or 15275 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 320442025 is about 17900.8945307211. The cubic root of 320442025 is about 684.3051721532.

Adding to 320442025 its reverse (520244023), we get a palindrome (840686048).

The spelling of 320442025 in words is "three hundred twenty million, four hundred forty-two thousand, twenty-five".