8461221571 has 32 divisors (see below), whose sum is σ = 9499052736. Its totient is φ = 7534912000.

The previous prime is 8461221557. The next prime is 8461221599. The reversal of 8461221571 is 1751221648.

It is not a de Polignac number, because 8461221571 - 2⁵ = 8461221539 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8461221571.

It is not an unprimeable number, because it can be changed into a prime (8461221541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15190425 + ... + 15190981.

It is an arithmetic number, because the mean of its divisors is an integer number (296845398).

Almost surely, 2^8461221571 is an apocalyptic number.

8461221571 is a deficient number, since it is larger than the sum of its proper divisors (1037831165).

8461221571 is a wasteful number, since it uses less digits than its factorization.

8461221571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804 (or 782 counting only the distinct ones).

The product of its digits is 26880, while the sum is 37.

The square root of 8461221571 is about 91984.8986029772. The cubic root of 8461221571 is about 2037.7192865518.

It can be divided in two parts, 8461 and 221571, that added together give a palindrome (230032).

The spelling of 8461221571 in words is "eight billion, four hundred sixty-one million, two hundred twenty-one thousand, five hundred seventy-one".