8131039161 has 16 divisors (see below), whose sum is σ = 12394481664. Its totient is φ = 4644685584.

The previous prime is 8131039153. The next prime is 8131039201. The reversal of 8131039161 is 1619301318.

It is a happy number.

It is not a de Polignac number, because 8131039161 - 2³ = 8131039153 is a prime.

It is a super-2 number, since 2×8131039161² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8131049161) 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, 4675 + ... + 127608.

It is an arithmetic number, because the mean of its divisors is an integer number (774655104).

Almost surely, 2^8131039161 is an apocalyptic number.

It is an amenable number.

8131039161 is a deficient number, since it is larger than the sum of its proper divisors (4263442503).

8131039161 is a wasteful number, since it uses less digits than its factorization.

8131039161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135220.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 8131039161 is about 90172.2749019897. The cubic root of 8131039161 is about 2010.8608443531.

The spelling of 8131039161 in words is "eight billion, one hundred thirty-one million, thirty-nine thousand, one hundred sixty-one".