8131675028521 has 16 divisors (see below), whose sum is σ = 9130349866176. Its totient is φ = 7177947840000.

The previous prime is 8131675028437. The next prime is 8131675028537. The reversal of 8131675028521 is 1258205761318.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8131675028521 is a prime.

It is a super-2 number, since 2×8131675028521² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8131675028551) 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, 42630720 + ... + 42821041.

It is an arithmetic number, because the mean of its divisors is an integer number (570646866636).

Almost surely, 2^{8131675028521} is an apocalyptic number.

It is an amenable number.

8131675028521 is a deficient number, since it is larger than the sum of its proper divisors (998674837655).

8131675028521 is a wasteful number, since it uses less digits than its factorization.

8131675028521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85452024.

The product of its (nonzero) digits is 806400, while the sum is 49.

The spelling of 8131675028521 in words is "eight trillion, one hundred thirty-one billion, six hundred seventy-five million, twenty-eight thousand, five hundred twenty-one".