8140352081 has 4 divisors (see below), whose sum is σ = 8175899700. Its totient is φ = 8104804464.

The previous prime is 8140352057. The next prime is 8140352111. The reversal of 8140352081 is 1802530418.

8140352081 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 6923737681 + 1216614400 = 83209^2 + 34880^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8140352081 is a prime.

It is a super-2 number, since 2×8140352081² (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 (8140352581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17773466 + ... + 17773923.

It is an arithmetic number, because the mean of its divisors is an integer number (2043974925).

Almost surely, 2^8140352081 is an apocalyptic number.

It is an amenable number.

8140352081 is a deficient number, since it is larger than the sum of its proper divisors (35547619).

8140352081 is a wasteful number, since it uses less digits than its factorization.

8140352081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35547618.

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 8140352081 is about 90223.8997217478. The cubic root of 8140352081 is about 2011.6282674205.

Adding to 8140352081 its reverse (1802530418), we get a palindrome (9942882499).

The spelling of 8140352081 in words is "eight billion, one hundred forty million, three hundred fifty-two thousand, eighty-one".