2180365081 has 2 divisors, whose sum is σ = 2180365082. Its totient is φ = 2180365080.

The previous prime is 2180365051. The next prime is 2180365091. The reversal of 2180365081 is 1805630812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2132961856 + 47403225 = 46184^2 + 6885^2 .

It is a cyclic number.

It is not a de Polignac number, because 2180365081 - 2⁵ = 2180365049 is a prime.

It is a super-2 number, since 2×2180365081² = 9507983772888273122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2180365051) 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, 1090182540 + 1090182541.

It is an arithmetic number, because the mean of its divisors is an integer number (1090182541).

Almost surely, 2^2180365081 is an apocalyptic number.

It is an amenable number.

2180365081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2180365081 is an equidigital number, since it uses as much as digits as its factorization.

2180365081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 2180365081 is about 46694.3795440094. The cubic root of 2180365081 is about 1296.7106348899.

Adding to 2180365081 its reverse (1805630812), we get a palindrome (3985995893).

The spelling of 2180365081 in words is "two billion, one hundred eighty million, three hundred sixty-five thousand, eighty-one".