320132261 has 2 divisors, whose sum is σ = 320132262. Its totient is φ = 320132260.

The previous prime is 320132233. The next prime is 320132299. The reversal of 320132261 is 162231023.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 185804161 + 134328100 = 13631^2 + 11590^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320132261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320132221) 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, 160066130 + 160066131.

It is an arithmetic number, because the mean of its divisors is an integer number (160066131).

Almost surely, 2^320132261 is an apocalyptic number.

It is an amenable number.

320132261 is a deficient number, since it is larger than the sum of its proper divisors (1).

320132261 is an equidigital number, since it uses as much as digits as its factorization.

320132261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 320132261 is about 17892.2402454248. The cubic root of 320132261 is about 684.0846003277.

Adding to 320132261 its reverse (162231023), we get a palindrome (482363284).

The spelling of 320132261 in words is "three hundred twenty million, one hundred thirty-two thousand, two hundred sixty-one".