1315343321 has 4 divisors (see below), whose sum is σ = 1315419600. Its totient is φ = 1315267044.

The previous prime is 1315343279. The next prime is 1315343339. The reversal of 1315343321 is 1233435131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1233435131 = 773 ⋅1595647.

It is a cyclic number.

It is not a de Polignac number, because 1315343321 - 2⁶ = 1315343257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1315343521) 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 3 ways as a sum of consecutive naturals, for example, 1370 + ... + 51308.

It is an arithmetic number, because the mean of its divisors is an integer number (328854900).

Almost surely, 2^1315343321 is an apocalyptic number.

It is an amenable number.

1315343321 is a deficient number, since it is larger than the sum of its proper divisors (76279).

1315343321 is an equidigital number, since it uses as much as digits as its factorization.

1315343321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76278.

The product of its digits is 3240, while the sum is 26.

The square root of 1315343321 is about 36267.6621937505. The cubic root of 1315343321 is about 1095.6698419573.

Adding to 1315343321 its reverse (1233435131), we get a palindrome (2548778452).

The spelling of 1315343321 in words is "one billion, three hundred fifteen million, three hundred forty-three thousand, three hundred twenty-one".