1315931568 has 160 divisors (see below), whose sum is σ = 4141449216. Its totient is φ = 351884544.

The previous prime is 1315931543. The next prime is 1315931569. The reversal of 1315931568 is 8651395131.

1315931568 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (1315931569) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 361405 + ... + 365027.

Almost surely, 2^1315931568 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 1315931568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2070724608).

1315931568 is an abundant number, since it is smaller than the sum of its proper divisors (2825517648).

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

1315931568 is a wasteful number, since it uses less digits than its factorization.

1315931568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3711 (or 3705 counting only the distinct ones).

The product of its digits is 97200, while the sum is 42.

The square root of 1315931568 is about 36275.7710876006. The cubic root of 1315931568 is about 1095.8331525368.

The spelling of 1315931568 in words is "one billion, three hundred fifteen million, nine hundred thirty-one thousand, five hundred sixty-eight".