320340451 has 2 divisors, whose sum is σ = 320340452. Its totient is φ = 320340450.

The previous prime is 320340443. The next prime is 320340479. The reversal of 320340451 is 154043023.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 320340451 - 2³ = 320340443 is a prime.

It is not a weakly prime, because it can be changed into another prime (320341451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160170225 + 160170226.

It is an arithmetic number, because the mean of its divisors is an integer number (160170226).

Almost surely, 2^320340451 is an apocalyptic number.

320340451 is a deficient number, since it is larger than the sum of its proper divisors (1).

320340451 is an equidigital number, since it uses as much as digits as its factorization.

320340451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 320340451 is about 17898.0571850690. The cubic root of 320340451 is about 684.2328606235.

Adding to 320340451 its reverse (154043023), we get a palindrome (474383474).

The spelling of 320340451 in words is "three hundred twenty million, three hundred forty thousand, four hundred fifty-one".