8231530521 has 16 divisors (see below), whose sum is σ = 11036748800. Its totient is φ = 5457084048.

The previous prime is 8231530499. The next prime is 8231530537. The reversal of 8231530521 is 1250351328.

It is not a de Polignac number, because 8231530521 - 2⁶ = 8231530457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8231530121) 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, 394140 + ... + 414498.

It is an arithmetic number, because the mean of its divisors is an integer number (689796800).

Almost surely, 2^8231530521 is an apocalyptic number.

It is an amenable number.

8231530521 is a deficient number, since it is larger than the sum of its proper divisors (2805218279).

8231530521 is a wasteful number, since it uses less digits than its factorization.

8231530521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21108.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 8231530521 is about 90727.7825200197. The cubic root of 8231530521 is about 2019.1110130132. Note that the first 3 decimals are identical.

Adding to 8231530521 its reverse (1250351328), we get a palindrome (9481881849).

The spelling of 8231530521 in words is "eight billion, two hundred thirty-one million, five hundred thirty thousand, five hundred twenty-one".