8131541217 has 8 divisors (see below), whose sum is σ = 11215919040. Its totient is φ = 5234095440.

The previous prime is 8131541203. The next prime is 8131541219. The reversal of 8131541217 is 7121451318.

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

It is not a de Polignac number, because 8131541217 - 2⁶ = 8131541153 is a prime.

It is a super-2 number, since 2×8131541217² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8131541219) 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, 46732909 + ... + 46733082.

It is an arithmetic number, because the mean of its divisors is an integer number (1401989880).

Almost surely, 2^8131541217 is an apocalyptic number.

8131541217 is a gapful number since it is divisible by the number (87) formed by its first and last digit.

It is an amenable number.

8131541217 is a deficient number, since it is larger than the sum of its proper divisors (3084377823).

8131541217 is a wasteful number, since it uses less digits than its factorization.

8131541217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93466023.

The product of its digits is 6720, while the sum is 33.

The square root of 8131541217 is about 90175.0587302276. The cubic root of 8131541217 is about 2010.9022307800.

The spelling of 8131541217 in words is "eight billion, one hundred thirty-one million, five hundred forty-one thousand, two hundred seventeen".