1310321320 has 128 divisors (see below), whose sum is σ = 3869337600. Its totient is φ = 386899200.

The previous prime is 1310321281. The next prime is 1310321323. The reversal of 1310321320 is 231230131.

It is a junction number, because it is equal to n+sod(n) for n = 1310321294 and 1310321303.

It is not an unprimeable number, because it can be changed into a prime (1310321323) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47325 + ... + 69715.

It is an arithmetic number, because the mean of its divisors is an integer number (30229200).

Almost surely, 2^1310321320 is an apocalyptic number.

1310321320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1310321320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1934668800).

1310321320 is an abundant number, since it is smaller than the sum of its proper divisors (2559016280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1310321320 is a wasteful number, since it uses less digits than its factorization.

1310321320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22439 (or 22435 counting only the distinct ones).

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

The square root of 1310321320 is about 36198.3607363648. The cubic root of 1310321320 is about 1094.2736354397.

Adding to 1310321320 its reverse (231230131), we get a palindrome (1541551451).

The spelling of 1310321320 in words is "one billion, three hundred ten million, three hundred twenty-one thousand, three hundred twenty".