8221428591 has 8 divisors (see below), whose sum is σ = 11438509440. Its totient is φ = 5242650072.

The previous prime is 8221428547. The next prime is 8221428613. The reversal of 8221428591 is 1958241228.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8221428591 - 2¹³ = 8221420399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8221428511) 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 7 ways as a sum of consecutive naturals, for example, 59575501 + ... + 59575638.

It is an arithmetic number, because the mean of its divisors is an integer number (1429813680).

Almost surely, 2^8221428591 is an apocalyptic number.

8221428591 is a deficient number, since it is larger than the sum of its proper divisors (3217080849).

8221428591 is a wasteful number, since it uses less digits than its factorization.

8221428591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119151165.

The product of its digits is 92160, while the sum is 42.

The square root of 8221428591 is about 90672.0937830378. The cubic root of 8221428591 is about 2018.2847078841.

The spelling of 8221428591 in words is "eight billion, two hundred twenty-one million, four hundred twenty-eight thousand, five hundred ninety-one".