71082881 has 2 divisors, whose sum is σ = 71082882. Its totient is φ = 71082880.

The previous prime is 71082877. The next prime is 71082887. The reversal of 71082881 is 18828017.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69872881 + 1210000 = 8359^2 + 1100^2 .

It is a cyclic number.

It is not a de Polignac number, because 71082881 - 2² = 71082877 is a prime.

It is a super-3 number, since 3×71082881³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71082887) 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, 35541440 + 35541441.

It is an arithmetic number, because the mean of its divisors is an integer number (35541441).

Almost surely, 2^71082881 is an apocalyptic number.

It is an amenable number.

71082881 is a deficient number, since it is larger than the sum of its proper divisors (1).

71082881 is an equidigital number, since it uses as much as digits as its factorization.

71082881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7168, while the sum is 35.

The square root of 71082881 is about 8431.0664212779. The cubic root of 71082881 is about 414.2428367549.

The spelling of 71082881 in words is "seventy-one million, eighty-two thousand, eight hundred eighty-one".