8131085486 has 4 divisors (see below), whose sum is σ = 12196628232. Its totient is φ = 4065542742.

The previous prime is 8131085477. The next prime is 8131085489. The reversal of 8131085486 is 6845801318.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6845801318 = 2 ⋅3422900659.

It is a super-2 number, since 2×8131085486² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8131085489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2032771370 + ... + 2032771373.

It is an arithmetic number, because the mean of its divisors is an integer number (3049157058).

Almost surely, 2^8131085486 is an apocalyptic number.

8131085486 is a deficient number, since it is larger than the sum of its proper divisors (4065542746).

8131085486 is a wasteful number, since it uses less digits than its factorization.

8131085486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4065542745.

The product of its (nonzero) digits is 184320, while the sum is 44.

The square root of 8131085486 is about 90172.5317710443. The cubic root of 8131085486 is about 2010.8646631742.

The spelling of 8131085486 in words is "eight billion, one hundred thirty-one million, eighty-five thousand, four hundred eighty-six".