320425531 has 2 divisors, whose sum is σ = 320425532. Its totient is φ = 320425530.

The previous prime is 320425507. The next prime is 320425541. The reversal of 320425531 is 135524023.

It is a strong prime.

It is an emirp because it is prime and its reverse (135524023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 320425531 - 2¹¹ = 320423483 is a prime.

It is a super-2 number, since 2×320425531² = 205345041833263922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 320425496 and 320425505.

It is not a weakly prime, because it can be changed into another prime (320425541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160212765 + 160212766.

It is an arithmetic number, because the mean of its divisors is an integer number (160212766).

Almost surely, 2^320425531 is an apocalyptic number.

320425531 is a deficient number, since it is larger than the sum of its proper divisors (1).

320425531 is an equidigital number, since it uses as much as digits as its factorization.

320425531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 320425531 is about 17900.4338215586. The cubic root of 320425531 is about 684.2934309517.

Adding to 320425531 its reverse (135524023), we get a palindrome (455949554).

It can be divided in two parts, 32042 and 5531, that added together give a palindrome (37573).

The spelling of 320425531 in words is "three hundred twenty million, four hundred twenty-five thousand, five hundred thirty-one".