80240081 has 2 divisors, whose sum is σ = 80240082. Its totient is φ = 80240080.

The previous prime is 80240047. The next prime is 80240089. The reversal of 80240081 is 18004208.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77281681 + 2958400 = 8791^2 + 1720^2 .

It is a cyclic number.

It is not a de Polignac number, because 80240081 - 2¹⁰ = 80239057 is a prime.

It is a super-2 number, since 2×80240081² = 12876941197773122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (80240089) 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, 40120040 + 40120041.

It is an arithmetic number, because the mean of its divisors is an integer number (40120041).

Almost surely, 2^80240081 is an apocalyptic number.

It is an amenable number.

80240081 is a deficient number, since it is larger than the sum of its proper divisors (1).

80240081 is an equidigital number, since it uses as much as digits as its factorization.

80240081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 80240081 is about 8957.6827918832. The cubic root of 80240081 is about 431.3175399083.

Adding to 80240081 its reverse (18004208), we get a palindrome (98244289).

The spelling of 80240081 in words is "eighty million, two hundred forty thousand, eighty-one".