8234471521 has 4 divisors (see below), whose sum is σ = 8316001044. Its totient is φ = 8152942000.

The previous prime is 8234471519. The next prime is 8234471527. The reversal of 8234471521 is 1251744328.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6687150625 + 1547320896 = 81775^2 + 39336^2 .

It is a cyclic number.

It is not a de Polignac number, because 8234471521 - 2¹ = 8234471519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8234471527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40764610 + ... + 40764811.

It is an arithmetic number, because the mean of its divisors is an integer number (2079000261).

Almost surely, 2^8234471521 is an apocalyptic number.

It is an amenable number.

8234471521 is a deficient number, since it is larger than the sum of its proper divisors (81529523).

8234471521 is a wasteful number, since it uses less digits than its factorization.

8234471521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81529522.

The product of its digits is 53760, while the sum is 37.

The square root of 8234471521 is about 90743.9888973369. The cubic root of 8234471521 is about 2019.3514502120.

The spelling of 8234471521 in words is "eight billion, two hundred thirty-four million, four hundred seventy-one thousand, five hundred twenty-one".