8124521931 has 12 divisors (see below), whose sum is σ = 11813140560. Its totient is φ = 5380477200.

The previous prime is 8124521929. The next prime is 8124521963. The reversal of 8124521931 is 1391254218.

8124521931 is a `hidden beast` number, since 8 + 12 + 452 + 193 + 1 = 666.

It is not a de Polignac number, because 8124521931 - 2¹ = 8124521929 is a prime.

It is a super-2 number, since 2×8124521931² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8124521921) 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 11 ways as a sum of consecutive naturals, for example, 2987796 + ... + 2990513.

It is an arithmetic number, because the mean of its divisors is an integer number (984428380).

Almost surely, 2^8124521931 is an apocalyptic number.

8124521931 is a deficient number, since it is larger than the sum of its proper divisors (3688618629).

8124521931 is a wasteful number, since it uses less digits than its factorization.

8124521931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5978466 (or 5978463 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 8124521931 is about 90136.1299979093. The cubic root of 8124521931 is about 2010.3234490988.

The spelling of 8124521931 in words is "eight billion, one hundred twenty-four million, five hundred twenty-one thousand, nine hundred thirty-one".