320325631 has 4 divisors (see below), whose sum is σ = 320668432. Its totient is φ = 319982832.

The previous prime is 320325563. The next prime is 320325637. The reversal of 320325631 is 136523023.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 320325631 - 2¹⁹ = 319801343 is a prime.

It is a super-2 number, since 2×320325631² = 205217019751096322, 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 = 320325596 and 320325605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320325637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169995 + ... + 171868.

It is an arithmetic number, because the mean of its divisors is an integer number (80167108).

Almost surely, 2^320325631 is an apocalyptic number.

320325631 is a deficient number, since it is larger than the sum of its proper divisors (342801).

320325631 is an equidigital number, since it uses as much as digits as its factorization.

320325631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342800.

The product of its (nonzero) digits is 3240, while the sum is 25.

The square root of 320325631 is about 17897.6431688644. The cubic root of 320325631 is about 684.2223088419. Note that the first 3 decimals are identical.

Adding to 320325631 its reverse (136523023), we get a palindrome (456848654).

The spelling of 320325631 in words is "three hundred twenty million, three hundred twenty-five thousand, six hundred thirty-one".