8229121591 has 16 divisors (see below), whose sum is σ = 8430870528. Its totient is φ = 8030080800.

The previous prime is 8229121573. The next prime is 8229121669. The reversal of 8229121591 is 1951219228.

It is a cyclic number.

It is not a de Polignac number, because 8229121591 - 2¹¹ = 8229119543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8229121291) 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, 5075761 + ... + 5077381.

It is an arithmetic number, because the mean of its divisors is an integer number (526929408).

Almost surely, 2^8229121591 is an apocalyptic number.

8229121591 is a deficient number, since it is larger than the sum of its proper divisors (201748937).

8229121591 is a wasteful number, since it uses less digits than its factorization.

8229121591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2382.

The product of its digits is 25920, while the sum is 40.

The square root of 8229121591 is about 90714.5059568755. The cubic root of 8229121591 is about 2018.9140317582.

The spelling of 8229121591 in words is "eight billion, two hundred twenty-nine million, one hundred twenty-one thousand, five hundred ninety-one".