1315831507 has 2 divisors, whose sum is σ = 1315831508. Its totient is φ = 1315831506.

The previous prime is 1315831493. The next prime is 1315831513. The reversal of 1315831507 is 7051385131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1315831507 - 2²⁷ = 1181613779 is a prime.

It is not a weakly prime, because it can be changed into another prime (1315831547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 657915753 + 657915754.

It is an arithmetic number, because the mean of its divisors is an integer number (657915754).

Almost surely, 2^1315831507 is an apocalyptic number.

1315831507 is a deficient number, since it is larger than the sum of its proper divisors (1).

1315831507 is an equidigital number, since it uses as much as digits as its factorization.

1315831507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12600, while the sum is 34.

The square root of 1315831507 is about 36274.3918901475. The cubic root of 1315831507 is about 1095.8053767915.

The spelling of 1315831507 in words is "one billion, three hundred fifteen million, eight hundred thirty-one thousand, five hundred seven".