1316323321 has 4 divisors (see below), whose sum is σ = 1316476672. Its totient is φ = 1316169972.

The previous prime is 1316323301. The next prime is 1316323343. The reversal of 1316323321 is 1233236131.

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 an emirpimes, since its reverse is a distinct semiprime: 1233236131 = 211 ⋅5844721.

It is a cyclic number.

It is not a de Polignac number, because 1316323321 - 2⁷ = 1316323193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1316323301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62985 + ... + 81238.

It is an arithmetic number, because the mean of its divisors is an integer number (329119168).

Almost surely, 2^1316323321 is an apocalyptic number.

It is an amenable number.

1316323321 is a deficient number, since it is larger than the sum of its proper divisors (153351).

1316323321 is an equidigital number, since it uses as much as digits as its factorization.

1316323321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153350.

The product of its digits is 1944, while the sum is 25.

The square root of 1316323321 is about 36281.1703366912. The cubic root of 1316323321 is about 1095.9418849720.

Adding to 1316323321 its reverse (1233236131), we get a palindrome (2549559452).

The spelling of 1316323321 in words is "one billion, three hundred sixteen million, three hundred twenty-three thousand, three hundred twenty-one".