1313220243 has 8 divisors (see below), whose sum is σ = 1798283728. Its totient is φ = 851818464.

The previous prime is 1313220217. The next prime is 1313220247. The reversal of 1313220243 is 3420223131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1313220243 - 2⁶ = 1313220179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1313220247) 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, 5915296 + ... + 5915517.

It is an arithmetic number, because the mean of its divisors is an integer number (224785466).

Almost surely, 2^1313220243 is an apocalyptic number.

1313220243 is a deficient number, since it is larger than the sum of its proper divisors (485063485).

1313220243 is a wasteful number, since it uses less digits than its factorization.

1313220243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11830853.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 1313220243 is about 36238.3807999199. The cubic root of 1313220243 is about 1095.0800225082.

Adding to 1313220243 its reverse (3420223131), we get a palindrome (4733443374).

The spelling of 1313220243 in words is "one billion, three hundred thirteen million, two hundred twenty thousand, two hundred forty-three".