7281325081 has 2 divisors, whose sum is σ = 7281325082. Its totient is φ = 7281325080.

The previous prime is 7281325057. The next prime is 7281325099. The reversal of 7281325081 is 1805231827.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6837801481 + 443523600 = 82691^2 + 21060^2 .

It is a cyclic number.

It is not a de Polignac number, because 7281325081 - 2⁹ = 7281324569 is a prime.

It is a super-2 number, since 2×7281325081² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7281325081.

It is not a weakly prime, because it can be changed into another prime (7281325001) 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, 3640662540 + 3640662541.

It is an arithmetic number, because the mean of its divisors is an integer number (3640662541).

Almost surely, 2^7281325081 is an apocalyptic number.

It is an amenable number.

7281325081 is a deficient number, since it is larger than the sum of its proper divisors (1).

7281325081 is an equidigital number, since it uses as much as digits as its factorization.

7281325081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 7281325081 is about 85330.6807719240. The cubic root of 7281325081 is about 1938.2217986132.

The spelling of 7281325081 in words is "seven billion, two hundred eighty-one million, three hundred twenty-five thousand, eighty-one".