1315191312 has 60 divisors (see below), whose sum is σ = 3707245360. Its totient is φ = 435236544.

The previous prime is 1315191259. The next prime is 1315191331. The reversal of 1315191312 is 2131915131.

It is a happy number.

1315191312 is a `hidden beast` number, since 13 + 1 + 519 + 131 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12838 + ... + 52869.

Almost surely, 2^1315191312 is an apocalyptic number.

1315191312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1315191312 is an abundant number, since it is smaller than the sum of its proper divisors (2392054048).

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

1315191312 is a wasteful number, since it uses less digits than its factorization.

1315191312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65860 (or 65851 counting only the distinct ones).

The product of its digits is 810, while the sum is 27.

The square root of 1315191312 is about 36265.5664784103. The cubic root of 1315191312 is about 1095.6276329283.

The spelling of 1315191312 in words is "one billion, three hundred fifteen million, one hundred ninety-one thousand, three hundred twelve".