320611541 has 2 divisors, whose sum is σ = 320611542. Its totient is φ = 320611540.

The previous prime is 320611537. The next prime is 320611561. The reversal of 320611541 is 145116023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 319336900 + 1274641 = 17870^2 + 1129^2 .

It is a cyclic number.

It is not a de Polignac number, because 320611541 - 2² = 320611537 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320611531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160305770 + 160305771.

It is an arithmetic number, because the mean of its divisors is an integer number (160305771).

Almost surely, 2^320611541 is an apocalyptic number.

It is an amenable number.

320611541 is a deficient number, since it is larger than the sum of its proper divisors (1).

320611541 is an equidigital number, since it uses as much as digits as its factorization.

320611541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 320611541 is about 17905.6287518758. The cubic root of 320611541 is about 684.4258182373.

Adding to 320611541 its reverse (145116023), we get a palindrome (465727564).

The spelling of 320611541 in words is "three hundred twenty million, six hundred eleven thousand, five hundred forty-one".