1315478985 has 16 divisors (see below), whose sum is σ = 2105386560. Its totient is φ = 701382080.

The previous prime is 1315478981. The next prime is 1315478987. The reversal of 1315478985 is 5898745131.

It is not a de Polignac number, because 1315478985 - 2² = 1315478981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1315478981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49375 + ... + 71195.

It is an arithmetic number, because the mean of its divisors is an integer number (131586660).

Almost surely, 2^1315478985 is an apocalyptic number.

1315478985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1315478985 is a deficient number, since it is larger than the sum of its proper divisors (789907575).

1315478985 is a wasteful number, since it uses less digits than its factorization.

1315478985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25848.

The product of its digits is 1209600, while the sum is 51.

The square root of 1315478985 is about 36269.5324618336. The cubic root of 1315478985 is about 1095.7075096498.

The spelling of 1315478985 in words is "one billion, three hundred fifteen million, four hundred seventy-eight thousand, nine hundred eighty-five".