82281313 has 2 divisors, whose sum is σ = 82281314. Its totient is φ = 82281312.

The previous prime is 82281299. The next prime is 82281319. The reversal of 82281313 is 31318228.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46676224 + 35605089 = 6832^2 + 5967^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82281313 is a prime.

It is not a weakly prime, because it can be changed into another prime (82281319) 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, 41140656 + 41140657.

It is an arithmetic number, because the mean of its divisors is an integer number (41140657).

Almost surely, 2^82281313 is an apocalyptic number.

It is an amenable number.

82281313 is a deficient number, since it is larger than the sum of its proper divisors (1).

82281313 is an equidigital number, since it uses as much as digits as its factorization.

82281313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 28.

The square root of 82281313 is about 9070.9047509055. The cubic root of 82281313 is about 434.9443941782.

The spelling of 82281313 in words is "eighty-two million, two hundred eighty-one thousand, three hundred thirteen".