6712271521 has 2 divisors, whose sum is σ = 6712271522. Its totient is φ = 6712271520.

The previous prime is 6712271471. The next prime is 6712271543. The reversal of 6712271521 is 1251722176.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5953819921 + 758451600 = 77161^2 + 27540^2 .

It is a cyclic number.

It is not a de Polignac number, because 6712271521 - 2¹⁹ = 6711747233 is a prime.

It is a super-3 number, since 3×6712271521³ (a number of 30 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (6712271591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3356135760 + 3356135761.

It is an arithmetic number, because the mean of its divisors is an integer number (3356135761).

Almost surely, 2^6712271521 is an apocalyptic number.

It is an amenable number.

6712271521 is a deficient number, since it is larger than the sum of its proper divisors (1).

6712271521 is an equidigital number, since it uses as much as digits as its factorization.

6712271521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11760, while the sum is 34.

The square root of 6712271521 is about 81928.4536714809. The cubic root of 6712271521 is about 1886.3538900389.

Adding to 6712271521 its reverse (1251722176), we get a palindrome (7963993697).

The spelling of 6712271521 in words is "six billion, seven hundred twelve million, two hundred seventy-one thousand, five hundred twenty-one".