1315945915 has 4 divisors (see below), whose sum is σ = 1579135104. Its totient is φ = 1052756728.

The previous prime is 1315945889. The next prime is 1315945921. The reversal of 1315945915 is 5195495131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1315945915 - 2⁹ = 1315945403 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131594587 + ... + 131594596.

It is an arithmetic number, because the mean of its divisors is an integer number (394783776).

Almost surely, 2^1315945915 is an apocalyptic number.

1315945915 is a deficient number, since it is larger than the sum of its proper divisors (263189189).

1315945915 is an equidigital number, since it uses as much as digits as its factorization.

1315945915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263189188.

The product of its digits is 121500, while the sum is 43.

The square root of 1315945915 is about 36275.9688361317. The cubic root of 1315945915 is about 1095.8371349782.

The spelling of 1315945915 in words is "one billion, three hundred fifteen million, nine hundred forty-five thousand, nine hundred fifteen".