71226272309 has 2 divisors, whose sum is σ = 71226272310. Its totient is φ = 71226272308.

The previous prime is 71226272263. The next prime is 71226272311. The reversal of 71226272309 is 90327262217.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43171697284 + 28054575025 = 207778^2 + 167495^2 .

It is an emirp because it is prime and its reverse (90327262217) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71226272309 - 2²⁰ = 71225223733 is a prime.

Together with 71226272311, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71226272389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35613136154 + 35613136155.

It is an arithmetic number, because the mean of its divisors is an integer number (35613136155).

Almost surely, 2^71226272309 is an apocalyptic number.

It is an amenable number.

71226272309 is a deficient number, since it is larger than the sum of its proper divisors (1).

71226272309 is an equidigital number, since it uses as much as digits as its factorization.

71226272309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 41.

The spelling of 71226272309 in words is "seventy-one billion, two hundred twenty-six million, two hundred seventy-two thousand, three hundred nine".