8221716231631 has 16 divisors (see below), whose sum is σ = 9459622192384. Its totient is φ = 6999767622144.

The previous prime is 8221716231611. The next prime is 8221716231643. The reversal of 8221716231631 is 1361326171228.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 8221716231631 - 2¹¹ = 8221716229583 is a prime.

It is a super-2 number, since 2×8221716231631² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8221716231601) 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, 3863541 + ... + 5600926.

It is an arithmetic number, because the mean of its divisors is an integer number (591226387024).

Almost surely, 2^{8221716231631} is an apocalyptic number.

8221716231631 is a deficient number, since it is larger than the sum of its proper divisors (1237905960753).

8221716231631 is a wasteful number, since it uses less digits than its factorization.

8221716231631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9465310.

The product of its digits is 145152, while the sum is 43.

The spelling of 8221716231631 in words is "eight trillion, two hundred twenty-one billion, seven hundred sixteen million, two hundred thirty-one thousand, six hundred thirty-one".