320331413 has 2 divisors, whose sum is σ = 320331414. Its totient is φ = 320331412.

The previous prime is 320331409. The next prime is 320331433. The reversal of 320331413 is 314133023.

It is an a-pointer prime, because the next prime (320331433) can be obtained adding 320331413 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 318908164 + 1423249 = 17858^2 + 1193^2 .

It is a cyclic number.

It is not a de Polignac number, because 320331413 - 2² = 320331409 is a prime.

It is a super-2 number, since 2×320331413² = 205224428309153138, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320331433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160165706 + 160165707.

It is an arithmetic number, because the mean of its divisors is an integer number (160165707).

Almost surely, 2^320331413 is an apocalyptic number.

It is an amenable number.

320331413 is a deficient number, since it is larger than the sum of its proper divisors (1).

320331413 is an equidigital number, since it uses as much as digits as its factorization.

320331413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 320331413 is about 17897.8046977835. The cubic root of 320331413 is about 684.2264256419.

Adding to 320331413 its reverse (314133023), we get a palindrome (634464436).

The spelling of 320331413 in words is "three hundred twenty million, three hundred thirty-one thousand, four hundred thirteen".