1315881108 has 36 divisors (see below), whose sum is σ = 3328238368. Its totient is φ = 438365520.

The previous prime is 1315881103. The next prime is 1315881167. The reversal of 1315881108 is 8011885131.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1315881103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55935 + ... + 75897.

Almost surely, 2^1315881108 is an apocalyptic number.

1315881108 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1315881108 is an abundant number, since it is smaller than the sum of its proper divisors (2012357260).

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

1315881108 is a wasteful number, since it uses less digits than its factorization.

1315881108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21804 (or 21799 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 36.

The square root of 1315881108 is about 36275.0755753865. The cubic root of 1315881108 is about 1095.8191456161.

The spelling of 1315881108 in words is "one billion, three hundred fifteen million, eight hundred eighty-one thousand, one hundred eight".