81232223218 has 8 divisors (see below), whose sum is σ = 122486284800. Its totient is φ = 40403461620.

The previous prime is 81232223197. The next prime is 81232223227.

81232223218 is nontrivially palindromic in base 10.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106324518 + ... + 106325281.

It is an arithmetic number, because the mean of its divisors is an integer number (15310785600).

Almost surely, 2^81232223218 is an apocalyptic number.

81232223218 is a deficient number, since it is larger than the sum of its proper divisors (41254061582).

81232223218 is a wasteful number, since it uses less digits than its factorization.

81232223218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212649992.

The product of its digits is 18432, while the sum is 34.

The spelling of 81232223218 in words is "eighty-one billion, two hundred thirty-two million, two hundred twenty-three thousand, two hundred eighteen".