8101653221 has 2 divisors, whose sum is σ = 8101653222. Its totient is φ = 8101653220.

The previous prime is 8101653169. The next prime is 8101653233. The reversal of 8101653221 is 1223561018.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8045193025 + 56460196 = 89695^2 + 7514^2 .

It is a cyclic number.

It is not a de Polignac number, because 8101653221 - 2¹⁰ = 8101652197 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8101653251) 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, 4050826610 + 4050826611.

It is an arithmetic number, because the mean of its divisors is an integer number (4050826611).

Almost surely, 2^8101653221 is an apocalyptic number.

It is an amenable number.

8101653221 is a deficient number, since it is larger than the sum of its proper divisors (1).

8101653221 is an equidigital number, since it uses as much as digits as its factorization.

8101653221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 8101653221 is about 90009.1840925136. The cubic root of 8101653221 is about 2008.4354731262.

The spelling of 8101653221 in words is "eight billion, one hundred one million, six hundred fifty-three thousand, two hundred twenty-one".