1315506313 has 6 divisors (see below), whose sum is σ = 1445969882. Its totient is φ = 1195914720.

The previous prime is 1315506271. The next prime is 1315506331. The reversal of 1315506313 is 3136055131.

It can be written as a sum of positive squares in only one way, i.e., 1308124224 + 7382089 = 36168^2 + 2717^2 .

It is not a de Polignac number, because 1315506313 - 2¹⁷ = 1315375241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1315506343) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5435856 + ... + 5436097.

Almost surely, 2^1315506313 is an apocalyptic number.

It is an amenable number.

1315506313 is a deficient number, since it is larger than the sum of its proper divisors (130463569).

1315506313 is a wasteful number, since it uses less digits than its factorization.

1315506313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10871975 (or 10871964 counting only the distinct ones).

The product of its (nonzero) digits is 4050, while the sum is 28.

The square root of 1315506313 is about 36269.9091948133. The cubic root of 1315506313 is about 1095.7150970731.

The spelling of 1315506313 in words is "one billion, three hundred fifteen million, five hundred six thousand, three hundred thirteen".