81322022318 has 16 divisors (see below), whose sum is σ = 124591253760. Its totient is φ = 39791782776.

The previous prime is 81322022293. The next prime is 81322022339.

81322022318 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×81322022318² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1002773 + ... + 1080831.

It is an arithmetic number, because the mean of its divisors is an integer number (7786953360).

Almost surely, 2^81322022318 is an apocalyptic number.

81322022318 is a deficient number, since it is larger than the sum of its proper divisors (43269231442).

81322022318 is a wasteful number, since it uses less digits than its factorization.

81322022318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89191.

The product of its (nonzero) digits is 9216, while the sum is 32.

It can be divided in two parts, 813220 and 22318, that added together give a palindrome (835538).

The spelling of 81322022318 in words is "eighty-one billion, three hundred twenty-two million, twenty-two thousand, three hundred eighteen".