1315273491 has 16 divisors (see below), whose sum is σ = 2226918400. Its totient is φ = 751584744.

The previous prime is 1315273483. The next prime is 1315273513. The reversal of 1315273491 is 1943725131.

1315273491 is a `hidden beast` number, since 13 + 1 + 527 + 34 + 91 = 666.

It is not a de Polignac number, because 1315273491 - 2³ = 1315273483 is a prime.

It is a super-2 number, since 2×1315273491² = 3459888712254654162, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1315273441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3479371 + ... + 3479748.

It is an arithmetic number, because the mean of its divisors is an integer number (139182400).

Almost surely, 2^1315273491 is an apocalyptic number.

1315273491 is a deficient number, since it is larger than the sum of its proper divisors (911644909).

1315273491 is an equidigital number, since it uses as much as digits as its factorization.

1315273491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6959135 (or 6959129 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 1315273491 is about 36266.6994776200. The cubic root of 1315273491 is about 1095.6504523481.

The spelling of 1315273491 in words is "one billion, three hundred fifteen million, two hundred seventy-three thousand, four hundred ninety-one".