1315320319 has 4 divisors (see below), whose sum is σ = 1315620544. Its totient is φ = 1315020096.

The previous prime is 1315320313. The next prime is 1315320323. The reversal of 1315320319 is 9130235131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9130235131 = 71 ⋅128594861.

It is a cyclic number.

It is not a de Polignac number, because 1315320319 - 2¹³ = 1315312127 is a prime.

It is a super-2 number, since 2×1315320319² = 3460135083148523522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1315320313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143442 + ... + 152335.

It is an arithmetic number, because the mean of its divisors is an integer number (328905136).

Almost surely, 2^1315320319 is an apocalyptic number.

1315320319 is a deficient number, since it is larger than the sum of its proper divisors (300225).

1315320319 is an equidigital number, since it uses as much as digits as its factorization.

1315320319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300224.

The product of its (nonzero) digits is 2430, while the sum is 28.

The square root of 1315320319 is about 36267.3450779072. The cubic root of 1315320319 is about 1095.6634550964.

The spelling of 1315320319 in words is "one billion, three hundred fifteen million, three hundred twenty thousand, three hundred nineteen".