8124521081 has 8 divisors (see below), whose sum is σ = 8585076480. Its totient is φ = 7672908672.

The previous prime is 8124521047. The next prime is 8124521123. The reversal of 8124521081 is 1801254218.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8124521081 is a prime.

It is a super-2 number, since 2×8124521081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8124520081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2233880 + ... + 2237513.

It is an arithmetic number, because the mean of its divisors is an integer number (1073134560).

Almost surely, 2^8124521081 is an apocalyptic number.

It is an amenable number.

8124521081 is a deficient number, since it is larger than the sum of its proper divisors (460555399).

8124521081 is a wasteful number, since it uses less digits than its factorization.

8124521081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4471495.

The product of its (nonzero) digits is 5120, while the sum is 32.

The square root of 8124521081 is about 90136.1252828188. The cubic root of 8124521081 is about 2010.3233789910.

Adding to 8124521081 its reverse (1801254218), we get a palindrome (9925775299).

The spelling of 8124521081 in words is "eight billion, one hundred twenty-four million, five hundred twenty-one thousand, eighty-one".