71348027521 has 2 divisors, whose sum is σ = 71348027522. Its totient is φ = 71348027520.

The previous prime is 71348027483. The next prime is 71348027539. The reversal of 71348027521 is 12572084317.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70849130625 + 498896896 = 266175^2 + 22336^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71348027521 is a prime.

It is a super-2 number, since 2×71348027521² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71348027551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35674013760 + 35674013761.

It is an arithmetic number, because the mean of its divisors is an integer number (35674013761).

Almost surely, 2^71348027521 is an apocalyptic number.

It is an amenable number.

71348027521 is a deficient number, since it is larger than the sum of its proper divisors (1).

71348027521 is an equidigital number, since it uses as much as digits as its factorization.

71348027521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 94080, while the sum is 40.

The spelling of 71348027521 in words is "seventy-one billion, three hundred forty-eight million, twenty-seven thousand, five hundred twenty-one".