1313200321 has 4 divisors (see below), whose sum is σ = 1313666692. Its totient is φ = 1312733952.

The previous prime is 1313200313. The next prime is 1313200367. The reversal of 1313200321 is 1230023131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1230023131 = 18169 ⋅67699.

It can be written as a sum of positive squares in 2 ways, for example, as 935442225 + 377758096 = 30585^2 + 19436^2 .

It is a cyclic number.

It is not a de Polignac number, because 1313200321 - 2³ = 1313200313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1313200295 and 1313200304.

It is not an unprimeable number, because it can be changed into a prime (1313200121) 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, 228936 + ... + 234601.

It is an arithmetic number, because the mean of its divisors is an integer number (328416673).

Almost surely, 2^1313200321 is an apocalyptic number.

It is an amenable number.

1313200321 is a deficient number, since it is larger than the sum of its proper divisors (466371).

1313200321 is an equidigital number, since it uses as much as digits as its factorization.

1313200321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466370.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1313200321 is about 36238.1059245651. The cubic root of 1313200321 is about 1095.0744849008.

Adding to 1313200321 its reverse (1230023131), we get a palindrome (2543223452).

The spelling of 1313200321 in words is "one billion, three hundred thirteen million, two hundred thousand, three hundred twenty-one".