320145641 has 2 divisors, whose sum is σ = 320145642. Its totient is φ = 320145640.

The previous prime is 320145613. The next prime is 320145653. The reversal of 320145641 is 146541023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 216207616 + 103938025 = 14704^2 + 10195^2 .

It is a cyclic number.

It is not a de Polignac number, because 320145641 - 2¹⁸ = 319883497 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 320145641.

It is not a weakly prime, because it can be changed into another prime (320145601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160072820 + 160072821.

It is an arithmetic number, because the mean of its divisors is an integer number (160072821).

Almost surely, 2^320145641 is an apocalyptic number.

It is an amenable number.

320145641 is a deficient number, since it is larger than the sum of its proper divisors (1).

320145641 is an equidigital number, since it uses as much as digits as its factorization.

320145641 is an evil number, because the sum of its binary digits is even.

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

The square root of 320145641 is about 17892.6141466249. The cubic root of 320145641 is about 684.0941306850.

Adding to 320145641 its reverse (146541023), we get a palindrome (466686664).

The spelling of 320145641 in words is "three hundred twenty million, one hundred forty-five thousand, six hundred forty-one".