8422247581 has 16 divisors (see below), whose sum is σ = 9596191680. Its totient is φ = 7323367680.

The previous prime is 8422247569. The next prime is 8422247597. The reversal of 8422247581 is 1857422248.

It is a cyclic number.

It is not a de Polignac number, because 8422247581 - 2²⁹ = 7885376669 is a prime.

It is a super-2 number, since 2×8422247581² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8422247501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151356 + ... + 199381.

It is an arithmetic number, because the mean of its divisors is an integer number (599761980).

Almost surely, 2^8422247581 is an apocalyptic number.

It is an amenable number.

8422247581 is a deficient number, since it is larger than the sum of its proper divisors (1173944099).

8422247581 is a wasteful number, since it uses less digits than its factorization.

8422247581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350844.

The product of its digits is 286720, while the sum is 43.

The square root of 8422247581 is about 91772.8041469803. The cubic root of 8422247581 is about 2034.5857633512.

The spelling of 8422247581 in words is "eight billion, four hundred twenty-two million, two hundred forty-seven thousand, five hundred eighty-one".