1318813122 has 48 divisors (see below), whose sum is σ = 2907465120. Its totient is φ = 398502720.

The previous prime is 1318813121. The next prime is 1318813141. The reversal of 1318813122 is 2213188131.

It is a self number, because there is not a number n which added to its sum of digits gives 1318813122.

It is not an unprimeable number, because it can be changed into a prime (1318813121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 272758 + ... + 277550.

It is an arithmetic number, because the mean of its divisors is an integer number (60572190).

Almost surely, 2^1318813122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1318813122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1453732560).

1318813122 is an abundant number, since it is smaller than the sum of its proper divisors (1588651998).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1318813122 is a wasteful number, since it uses less digits than its factorization.

1318813122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5199 (or 5188 counting only the distinct ones).

The product of its digits is 2304, while the sum is 30.

The square root of 1318813122 is about 36315.4667049730. The cubic root of 1318813122 is about 1096.6324343097.

The spelling of 1318813122 in words is "one billion, three hundred eighteen million, eight hundred thirteen thousand, one hundred twenty-two".