215181610673 has 2 divisors, whose sum is σ = 215181610674. Its totient is φ = 215181610672.

The previous prime is 215181610621. The next prime is 215181610691. The reversal of 215181610673 is 376016181512.

215181610673 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122785065649 + 92396545024 = 350407^2 + 303968^2 .

It is a cyclic number.

It is not a de Polignac number, because 215181610673 - 2⁸ = 215181610417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 215181610673.

It is not a weakly prime, because it can be changed into another prime (215181910673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107590805336 + 107590805337.

It is an arithmetic number, because the mean of its divisors is an integer number (107590805337).

Almost surely, 2^215181610673 is an apocalyptic number.

It is an amenable number.

215181610673 is a deficient number, since it is larger than the sum of its proper divisors (1).

215181610673 is an equidigital number, since it uses as much as digits as its factorization.

215181610673 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 41.

The spelling of 215181610673 in words is "two hundred fifteen billion, one hundred eighty-one million, six hundred ten thousand, six hundred seventy-three".