320321825 has 12 divisors (see below), whose sum is σ = 402795648. Its totient is φ = 252646800.

The previous prime is 320321821. The next prime is 320321861. The reversal of 320321825 is 528123023.

It is not a de Polignac number, because 320321825 - 2² = 320321821 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 320321794 and 320321803.

It is not an unprimeable number, because it can be changed into a prime (320321821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88457 + ... + 92006.

It is an arithmetic number, because the mean of its divisors is an integer number (33566304).

Almost surely, 2^320321825 is an apocalyptic number.

It is an amenable number.

320321825 is a deficient number, since it is larger than the sum of its proper divisors (82473823).

320321825 is a wasteful number, since it uses less digits than its factorization.

320321825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180544 (or 180539 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 320321825 is about 17897.5368416998. The cubic root of 320321825 is about 684.2195989324.

Adding to 320321825 its reverse (528123023), we get a palindrome (848444848).

The spelling of 320321825 in words is "three hundred twenty million, three hundred twenty-one thousand, eight hundred twenty-five".