1313221530 has 16 divisors (see below), whose sum is σ = 3151731744. Its totient is φ = 350192400.

The previous prime is 1313221523. The next prime is 1313221531. The reversal of 1313221530 is 351223131.

It is a junction number, because it is equal to n+sod(n) for n = 1313221497 and 1313221506.

It is not an unprimeable number, because it can be changed into a prime (1313221531) 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, 21886996 + ... + 21887055.

It is an arithmetic number, because the mean of its divisors is an integer number (196983234).

Almost surely, 2^1313221530 is an apocalyptic number.

1313221530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1313221530 is an abundant number, since it is smaller than the sum of its proper divisors (1838510214).

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

1313221530 is a wasteful number, since it uses less digits than its factorization.

1313221530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43774061.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 1313221530 is about 36238.3985573314. The cubic root of 1313221530 is about 1095.0803802465.

Adding to 1313221530 its reverse (351223131), we get a palindrome (1664444661).

The spelling of 1313221530 in words is "one billion, three hundred thirteen million, two hundred twenty-one thousand, five hundred thirty".