7443081281 has 2 divisors, whose sum is σ = 7443081282. Its totient is φ = 7443081280.

The previous prime is 7443081263. The next prime is 7443081293. The reversal of 7443081281 is 1821803447.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6639642256 + 803439025 = 81484^2 + 28345^2 .

It is a cyclic number.

It is not a de Polignac number, because 7443081281 - 2¹⁰ = 7443080257 is a prime.

It is a super-2 number, since 2×7443081281² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7443081211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3721540640 + 3721540641.

It is an arithmetic number, because the mean of its divisors is an integer number (3721540641).

Almost surely, 2^7443081281 is an apocalyptic number.

It is an amenable number.

7443081281 is a deficient number, since it is larger than the sum of its proper divisors (1).

7443081281 is an equidigital number, since it uses as much as digits as its factorization.

7443081281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 7443081281 is about 86273.2941355551. The cubic root of 7443081281 is about 1952.4694797902.

The spelling of 7443081281 in words is "seven billion, four hundred forty-three million, eighty-one thousand, two hundred eighty-one".