485281681 has 2 divisors, whose sum is σ = 485281682. Its totient is φ = 485281680.

The previous prime is 485281651. The next prime is 485281729. The reversal of 485281681 is 186182584.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 441840400 + 43441281 = 21020^2 + 6591^2 .

It is a cyclic number.

It is not a de Polignac number, because 485281681 - 2¹¹ = 485279633 is a prime.

It is a super-2 number, since 2×485281681² = 470996619828371522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (485281631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 242640840 + 242640841.

It is an arithmetic number, because the mean of its divisors is an integer number (242640841).

Almost surely, 2^485281681 is an apocalyptic number.

It is an amenable number.

485281681 is a deficient number, since it is larger than the sum of its proper divisors (1).

485281681 is an equidigital number, since it uses as much as digits as its factorization.

485281681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122880, while the sum is 43.

The square root of 485281681 is about 22029.1098549170. The cubic root of 485281681 is about 785.8348757579.

The spelling of 485281681 in words is "four hundred eighty-five million, two hundred eighty-one thousand, six hundred eighty-one".