8221861443 has 4 divisors (see below), whose sum is σ = 10962481928. Its totient is φ = 5481240960.

The previous prime is 8221861429. The next prime is 8221861463. The reversal of 8221861443 is 3441681228.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 8221861443 - 2⁵ = 8221861411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8221861423) 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 in 3 ways as a sum of consecutive naturals, for example, 1370310238 + ... + 1370310243.

It is an arithmetic number, because the mean of its divisors is an integer number (2740620482).

Almost surely, 2^8221861443 is an apocalyptic number.

8221861443 is a deficient number, since it is larger than the sum of its proper divisors (2740620485).

8221861443 is a wasteful number, since it uses less digits than its factorization.

8221861443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2740620484.

The product of its digits is 73728, while the sum is 39.

The square root of 8221861443 is about 90674.4806602166. The cubic root of 8221861443 is about 2018.3201276505.

The spelling of 8221861443 in words is "eight billion, two hundred twenty-one million, eight hundred sixty-one thousand, four hundred forty-three".