8221474931318 has 32 divisors (see below), whose sum is σ = 13767868477440. Its totient is φ = 3649681395360.

The previous prime is 8221474931317. The next prime is 8221474931381. The reversal of 8221474931318 is 8131394741228.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 8221474931318.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8221474931311) 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, 7296971 + ... + 8347977.

It is an arithmetic number, because the mean of its divisors is an integer number (430245889920).

Almost surely, 2^{8221474931318} is an apocalyptic number.

8221474931318 is a deficient number, since it is larger than the sum of its proper divisors (5546393546122).

8221474931318 is a wasteful number, since it uses less digits than its factorization.

8221474931318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059332.

The product of its digits is 2322432, while the sum is 53.

The spelling of 8221474931318 in words is "eight trillion, two hundred twenty-one billion, four hundred seventy-four million, nine hundred thirty-one thousand, three hundred eighteen".