1213313108 has 48 divisors (see below), whose sum is σ = 2481427200. Its totient is φ = 518884128.

The previous prime is 1213313099. The next prime is 1213313147. The reversal of 1213313108 is 8013133121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1216466 + ... + 1217462.

It is an arithmetic number, because the mean of its divisors is an integer number (51696400).

Almost surely, 2^1213313108 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1213313108, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1240713600).

1213313108 is an abundant number, since it is smaller than the sum of its proper divisors (1268114092).

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

1213313108 is an equidigital number, since it uses as much as digits as its factorization.

1213313108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1909 (or 1893 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1213313108 is about 34832.6442866458. The cubic root of 1213313108 is about 1066.5739276577.

Adding to 1213313108 its reverse (8013133121), we get a palindrome (9226446229).

The spelling of 1213313108 in words is "one billion, two hundred thirteen million, three hundred thirteen thousand, one hundred eight".