8192277521 has 2 divisors, whose sum is σ = 8192277522. Its totient is φ = 8192277520.

The previous prime is 8192277433. The next prime is 8192277529. The reversal of 8192277521 is 1257722918.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4838593600 + 3353683921 = 69560^2 + 57911^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8192277521 is a prime.

It is a super-2 number, since 2×8192277521² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8192277529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4096138760 + 4096138761.

It is an arithmetic number, because the mean of its divisors is an integer number (4096138761).

Almost surely, 2^8192277521 is an apocalyptic number.

It is an amenable number.

8192277521 is a deficient number, since it is larger than the sum of its proper divisors (1).

8192277521 is an equidigital number, since it uses as much as digits as its factorization.

8192277521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 44.

The square root of 8192277521 is about 90511.2010803083. The cubic root of 8192277521 is about 2015.8964435428.

The spelling of 8192277521 in words is "eight billion, one hundred ninety-two million, two hundred seventy-seven thousand, five hundred twenty-one".