1313500321 has 8 divisors (see below), whose sum is σ = 1531779200. Its totient is φ = 1125857124.

The previous prime is 1313500301. The next prime is 1313500339. The reversal of 1313500321 is 1230053131.

It is not a de Polignac number, because 1313500321 - 2⁵ = 1313500289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1313500301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1914381 + ... + 1915066.

It is an arithmetic number, because the mean of its divisors is an integer number (191472400).

Almost surely, 2^1313500321 is an apocalyptic number.

It is an amenable number.

1313500321 is a deficient number, since it is larger than the sum of its proper divisors (218278879).

1313500321 is an frugal number, since it uses more digits than its factorization.

1313500321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3829468 (or 3829454 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 19.

The square root of 1313500321 is about 36242.2449773741. The cubic root of 1313500321 is about 1095.1578683030.

Adding to 1313500321 its reverse (1230053131), we get a palindrome (2543553452).

The spelling of 1313500321 in words is "one billion, three hundred thirteen million, five hundred thousand, three hundred twenty-one".