9281138421571 has 2 divisors, whose sum is σ = 9281138421572. Its totient is φ = 9281138421570.

The previous prime is 9281138421523. The next prime is 9281138421613. The reversal of 9281138421571 is 1751248311829.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9281138421571 - 2²³ = 9281130032963 is a prime.

It is a super-2 number, since 2×9281138421571² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9281138421371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4640569210785 + 4640569210786.

It is an arithmetic number, because the mean of its divisors is an integer number (4640569210786).

Almost surely, 2^{9281138421571} is an apocalyptic number.

9281138421571 is a deficient number, since it is larger than the sum of its proper divisors (1).

9281138421571 is an equidigital number, since it uses as much as digits as its factorization.

9281138421571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 967680, while the sum is 52.

The spelling of 9281138421571 in words is "nine trillion, two hundred eighty-one billion, one hundred thirty-eight million, four hundred twenty-one thousand, five hundred seventy-one".